Answer:
uh yes?
Explanation:
Answer:
i think so just try it
Explanation:
good luck
Scientists can identify an element by looking at the structure of a single A.molecule. B.electron. C.neutron. D.atom.
By definition, the correct answer is option D. Scientists can identify an element by looking at the structure of a single atom because the number of protons can be determined, and thus its identity.
All atoms are composed of a central nucleus in which there are particles with a positive electric charge, the protons, and neutron, which is an electrically neutral subatomic particle, around which other particles with a negative electric charge that are electrons move.
Thus, the atom is electrically neutral, since the positive charge of the protons is compensated by the negative charge of the electrons.
Atoms of different elements have different amounts of protons. The atomic number (which is identified by the letter Z) indicates the amount of protons that is present in the nucleus of an atom.
This number is then responsible for defining the electronic configuration of the atom and the chemical properties of the element. Then it is possible to say that the number of protons in the nucleus, that is to say the atomic number Z, of an atom determines its identity.
Finally, the correct answer is option D. Scientists can identify an element by looking at the structure of a single atom because the number of protons can be determined, and thus its identity.
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Answer: ???? Chicken strips?
Explanation:None
Answer:
my input on this question is 69,420
Which of the following is an example of a chemical change?
A- The shell of an egg breaks when it is struck against a hard surface.
B- Chocolate squares are melted to make cake icing.
C- Flour and sugar are sifted together into a measuring cup.
D- A mixture of flour, sugar, eggs, and butter is baked to become a cake.
Answer:
D
Explanation:
It is D because once youve put together the ingredients and baked it you can not go in and taake out every ingredient and put it back to how it was before (Please also try to help me with my question it it about scaled copies, Please and thank you!)
Answer:
I believe the answer is B. Chocolate squares are melted to make cake icing.
Explanation:
An atom's nucleus contains three protons and three neutrons. What is the
overall charge of the nucleus?
A. -3
B. +6
C. +3
D.O
Answer:
C- +3
Explanation:
Protons equal one positive charge, neutrons equal one neutral charge.
3 + 0 = 3
An atom's nucleus contains three protons and three neutrons. Then the overall charge of the nucleus is +3. Therefore, option C is correct.
What is neutron ?The neutron, symbol n or n0, is a subatomic particle with a neutral charge and slightly more mass than a proton. Atomic nuclei consist of protons and neutrons.
When alpha particles strike any of a number of light isotopes, such as isotopes of beryllium, carbon, or oxygen, neutrons are created. This means that an alpha-emitter, such as radium, polonium, or americium, can be combined with a low-atomic-weight isotope to create a neutron source.
The neutrons' main job in an atom's nucleus is to contribute to the nuclear glue, or binding energy, that binds the nucleus together. This is understandable as follows: Protons and neutrons make up an atomic nucleus.
Thus, option C is correct.
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when earth is closest to the sun, the northern hemisphere is in winter, why is this true?
Explanation:
Opposite hemispheres have opposite seasons, no matter the earth's rotation, because of the earth's tilt. The earth's tilt is responsible for all seasons.
Plz help!
How is gold an element? Explain.
Answer:
Gold is an extremely rare element on Earth. Because it doesn't react with very many other elements, it is often found in its native form in the Earth's crust or mixed with other metals like silver. ... Gold is also found in ocean water.
Explanation:
What was the atomic theory about?
A) the existence of isotopes
B) the properties of the nucleus
C) the structure of the atom
D) the existence of electrons
Answer:
C
Explanation:
According to John Dalton's Atomic theory, it was about the structure of the atoms: "Each chemical element is composed of extremely small particles that are indivisible and cannot be seen by the naked eye, called atoms"
Answer:
C, the structure of the arom
Explanation:
It says it on google
What is the mass of Darmstadtium?
Answer:
281 u
Explanation:
Answer:
281 u
Explanation:
Which is the best metal to use in an alloy to increase its electrical conductivity?
Aluminum (Al)
Silver (Ag)
Zinc (Zn)
Antimony (Sb)
Answer:
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Which is the best metal to use in an alloy to increase its electrical conductivity?
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Silver(Ag)..........
From the options The metal that would increase the electrical conductivity of an alloy is ; Silver ( Ag )
Silver ( Ag ) with an electrical conductivity of 6.3x10⁷ m/ohm is the best electrical conductor in its pure state. although aluminum and copper are good conductors of electricity. Silver been the best conductor should be the best metal to be used in an alloy to increase the electrical conductivity of the alloy.
Hence we can conclude that The metal that would increase the electrical conductivity of an alloy is ; Silver ( Ag
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HEY GUYS! ok i have to tell the girls something pleease do not ask me "why on a homwork app?" but i have been doing online school since march 13 and i started dating this guy september 24 and i am finally going to meet him on monday for the first time because he just moved here!!! HOW DO I ACT WHEN I FIST SEE HIM!!!
100 point for best answer!
Answer:
Act exactly how he sees you... like what ever your personaltiy is, act that way but multilpy it...
Explanation:
Be kind and say hello
Answer:
Don't act weird, Act like a normal person and act like you are really going to have a great relationship!
Explanation:
I have had like 4 boyfriends, We broke up cause I acted weird and I was appeartly a bad girlfriend. So yeah, But there are plenty of fishes in the sea for ya:) Mark me brainlest please!! Hope he is nice to ya, even tho your just friends. Have a great day!!
A graph of potential energy versus internuclear distance for two Cl atoms is given below. On the same graph, carefully sketch a curve that corresponds to potential energy versus internuclear distance for two Br atoms.
Answer:
Explanation:
The sketch of the curve for two Br atoms can be seen in the image attached below. From the image below, we can deduce the following:
On the periodic table, the Bromine (Br) atom is the fourth member in the halogen family group. The atomic size increases from top to bottom down the group, thus Br atom posses a larger atomic size than Cl atom. As a result of that, the bond length formation between the two Br atoms will be larger compared to that of the two Cl atoms.
Imagine you have two beakers. Both beakers are filled with the same amount of water. The water in both beakers is the same temperature as well. You add 50 g of Substance A to the first beaker, and 50 g of Substance B to the second beaker. After stirring both beakers, there is a small pile of Substance A at the bottom of the first beaker. None of Substance B is visible in the second beaker. Which of the following statements is true? A. Substance A is less soluble in water than Substance B. B. Substance A is more soluble in water than Substance B. C. Substance A is not soluble in water. D. Substance B is not soluble in water.
Answer:
A.) Substance A is less soluble in water than Substance B.
Explanation:
Substance A is less soluble in water than Substance B.
What is Solubility?
This is defined as the ability of a substance, the solute, to form a solution with another substance, the solvent.
We were told that small particles were present in Substance A and none in Substance B which means all was dissolved which is why option A was chosen as the most appropriate choice.
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Noble gases are ________ because they have ______ outer shell electrons. A. very reactive, 1 B. inert, 8 C. inert, 0 D. very reactive, 8
Answer:
B
Explanation:
They don't react to other elements because their valence shell is already full.
Noble gases are inert because they have 8 outer shell electrons.
The correct answer is B) inert, 8
What is an electron quick answer?
An electron is a negatively charged subatomic particle. It is able to be either loose (no longer attached to any atom), or bound to the nucleus of an atom. Electrons in atoms exist in spherical shells of diverse radii, representing electricity ranges.
What number of electrons are in the outer shell?A maximum of the elements essential in biology want eight electrons in their outermost shell for you to be stable, and this rule of thumb is referred to as the octet rule.
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Arrow A is pointing to the:
It points at the suture , bone.
Which temperature equation do you use when trying to find Celsius?
please i need help before 9:00 am today.
Answer: First subtract 32 degrees, then multiply the result by 5/9 (0.556 on a calculator). For example, suppose a thermometer reads 68 degrees Fahrenheit. Subtract 32 from 68, leaving 36. Multiply 36 by 5/9, which equals 20 degrees Celsius.
Explanation:
A potato cooks in a microwave oven. Microwaves are invisible waves that contain energy. How is heat being added to the potato?
Answer:
radiation
Explanation:
Microwave ovens are so quick and efficient because they channel heat energy directly to the molecules (tiny particles) inside food. Microwaves heat food like the sun heats your face—by radiation.
Answer:
The energy from the microwaves is absorbed by the potato.
Explanation:
An atom with 2 protons, 3 neutrons, and 4 electrons has a charge of
Answer: It has a charge of -2 because it has 2 more electrons than protons meaning it has a negative charge of 2 which is -2. Neutrons don't effect charge.
( +1 +1 -1 -1 -1 -1) = -2
Each proton has a charge of +1 and each electron has -1.
2(1) - 4(1) = -2
Answer:
2×-1.6×10^-19 C= -3.2×10^-19 C
Explanation:
charge on one proton is 1.6×10^-19 C
lets call this +q
therefore charge on on electron is -q
neutron does not have any charge, it is a neutral particle
Therefore the net charge will be
2q-4q= -2q
(q = 1.6×10^-19 C)
What is the major difference between electrons reacting and protons and neutrons reacting?
a
change in mass
b
change in energy
c
change in organization
d
all of the above
How is a nuclear change or reaction fundamentally different from a chemical reaction?
(1) Nuclear reactions involve a change in an atom's nucleus, usually producing a different element. Chemical reactions, on the other hand, involve only a rearrangement of electrons and do not involve changes in the nuclei. Hope this helps! :)
Which statement about the electron-cloud model is true? It is the currently accepted atomic model. It can easily be replaced by existing models. It specifies the location and momentum of an electron. It does not explain the formation of emission lines.
Answer:
A
Explanation:
just did the test
The electron cloud model is the modern model of the atom that contrasts the exact position of the electron. It is the currently accepted atomic model. Thus, option A is correct.
What is the electron-cloud model?The electron-cloud model is currently accepted and used model that states about the moving electron cloud around the nucleus in an atom. It contrasts with the previous models.
The electron cloud gives the probable position of the electron rather than a fixed position. It was given by Erwin Schrodinger that showed electrons no longer move in a fixed orbital around the atom.
The position of the electron is determined based on the cloud where they are most likely to be present. The field with high probability is represented as a dense area.
Therefore, option A. electron-cloud model is a modern atomic model.
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what is an organelle-
A. A leaf cell that is responsible for performing photosynthesis
B. A structure inside the cell that performs a specific function
C. A group of cells that performs a task
D.A type of unicellular organism that can carry out life functions
Answer:
B
Explanation:
it's on the internet and I just know because I did this before too
which property of matter changes during a chemical change but not during a physical change
Answer:In a physical change, atoms are not rearranged and the matter's physical and chemical properties are unchanged. Chemical changes, on the other hand, rearrange the atoms of matter in new combinations, resulting in matter with new physical and chemical properties.
Explanation:
easy
What is true of gas?
Answer:
Gas is a state of matter that has no fixed shape and no fixed volume. Gases have lower density than other states of matter, such as solids and liquids. There is a great deal of empty space between particles, which have a lot of kinetic energy. ... The particles exert more force on the interior volume of the container
Explanation:
Answer:
Gas is a state of matter that has no fixed shape and no fixed volume. Gases have lower density than other states of matter, such as solids and liquids. There is a great deal of empty space between particles, which have a lot of kinetic energy. ... The particles exert more force on the interior volume of the container.
Explanation:
PLEASE HELP ASAP!
Read carefully and Fill in the blanks
Li = 1s^2 2s^1
Mg = 1s^2 2s^2 2p^6 3s^2
Br = 2s ^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^10 4p^5
What is the boiling point of steel?
Answer:
Steel often melts at around 1370 degrees C (2500°F)."
Explanation:
your welcome
Answer:
Steel often melts at around 1370 degrees C (2500°F)."
Explanation:
ASAP MULTIPLE CHOICE WILL MARK BRAINLIEST
An electrically neutral atom of beryllium has four protons.
Which statement is true?
There are four electrons.
There are four neutrons in the nucleus.
There is a charge of +4 on an atom of beryllium.
There is a charge of −4 on an atom of beryllium.
Answer:
There are four electrons
Write down physical and chemical properties for rust, at least 4 each will give brainliest
Answer:
Physical properties; Gallium metal melts at 30⁰c
Chemical properties; Iron metal rusts
7. Crive reason :
a) CO₂ as
oxide
Please help.
The scientific method is a __________________
used during a scientific ____________________
to answer a scientific question.
Answer:
1. a series of steps 2. experiment
Explanation:
Which of the following best describes the function of the nucleus?
The nucleus controls the cell and contains DNA.
The nucleus transports materials inside the cell.
The nucleus holds the parts of the cell together.
The nucleus stores materials like food and waste.
Answer:
A
Explanation:
the nucleus has all the information about the cell and has the DNA
The function of the nucleus is that the nucleus controls the cell and contains DNA. Hence option A is correct.
What is DNA?DNA stands for deoxyribonucleic acid. DNA is defined as the molecule that contains the genetic material necessary for a creature to develop and function. Adenine (A), cytosine (C), guanine (G), and thymine (T) are the four different types of smaller chemical molecules together known as nucleotide bases that make up the linear molecule DNA .
Nucleus are defined as an organelle with two membranes that houses the genetic material and other instructions needed for cellular functions. A positively charged nucleus and a cloud of negatively charged atoms make form an atom.
Thus, the function of the nucleus is that the nucleus controls the cell and contains DNA. Hence option A is correct.
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List four metric prefixes and list what they stand for ( what they mean )