The two observations you would make about the atoms are
They are made up largely of empty spaceTheir mass is concentrated at the center called a nucleusThese observations were made by Ernest Rutherford in his model of the atom established in 1911, when he performed his gold foil experiment and observed the scattering angle of the alpha particles which led him to conclude that the mass of the atom was concentrated at the center.
Also, that most of the alpha particles also went through the gold foil suggested that the atom was made up basically of empty space.
So,
The two observations you would make about the atoms are
They are made up largely of empty spaceTheir mass is concentrated at the center called a nucleusLearn more about the atom here:
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Salt is added to water at room temperature, and the solution remains at room temperature. Which of the following does not apply to the more concentrated salt solution?
Select one:
a. It has a higher boiling point than water.
b. It has a greater electrical conductivity than water.
c. It has a lower freezing point than water.
d. The salt absorbs energy from the water.
Answer:
A
Explanation:
the part of an atom that has an overall positive charge is called
What kind of feature results from the convergence of two oceanic plates?
Answer: When a convergent boundary occurs between two oceanic plates, one of those plates will subduct beneath the other. Normally the older plate will subduct because of its higher density. The subducting plate is heated as it is forced deeper into the mantle, and at a depth of about 100 miles (150 km) the plate begins to melt.
Explanation:
Answer two questions below:
Answer:
Atoms,
Molecules
on an energy diagram, where is a stable equilibrium point?
Answer:
1.2
Explanation:
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Describe the structure of solid potassium iodide.
Answer:
Potassium iodide is a metal-halide salt that has an ionic connection between the potassium cation (K+) and the iodide anion (I–). It is colorless to white and appears as cubical crystals, powder, or white granules. It has a salty, astringent flavor. This chemical is made from iodine and potassium hydroxide.
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Answer:
Carbon Monoxide- D)
Nitrogen Oxides- A)
Particulate matter- C)
Sulfur Oxides- B)
Explanation:
Answer is 100% verified
Count on me, I'm a Chemistry Guru
AJUTOR VA ROG AM TEST SI MAI AM 10 MINUTE AM NEVOIE DE SUBPUNCTUL C SI D
Explanation:
desk I have a lot of work and I will send it in the one
Which of the following would exhibit the lowest conductivity?
a. Mg
b. NaCl
c. CO(2)
d. MgCl(2)
Answer:
the correct answer is b. Co2...............
Suppose a high-flying jumbo jet with a mass of 45,000 kg cruises at constant velocity when the thrust of its engine is a constant 80,000 N. What is the acceleration of the jet?
Answer:
1.78 m/s²Explanation:
The acceleration of an object given it's mass and the force acting on it can be found by using the formula
[tex]a = \frac{f}{m} \\ [/tex]
f is the force
m is the mass
From the question we have
[tex]a = \frac{80000}{45000} = \frac{80}{45} \\ = 1.77777...[/tex]
We have the final answer as
1.78 m/s²Hope this helps you
What reasons did the Pilgrims give for creating the Mayflower Compact?
to create a colony, establish a new church, and provide a long life for their children
to organize a new nation and create order, and for financial gain
to organize themselves, guarantee a long life for the colony, and achieve their goals in setting up the colony
“[To] Combine ourselves together into a Civil Body Politic, for our better ordering and preservation and furtherance of the ends aforesaid”
—Mayflower Compact
Answer:
To organize a new nation and create order and for financial gain.
Answer:
C the person above is wrong its
Explanation:
to organize themselves, guarantee a long life for the colony, and achieve their goals in setting up the colony
Explanation:
lol can some have helo me out its easy
1, 2 and 3
Answer:
1. A
2. C
3. C
Explanation:
1. there are single cell organisms
2. all others are abiotic factors
3. individual is just one, population is one species, community is all populations, ecosystem includes abiotic and biotic factors, biome is a large geographical area.
Hydrogen sulfide gas is combusted with oxygen gas to produce sulfur dioxide gas and water vapour. If there is 48.4 L of oxygen available. What volume of hydrogen sulfide gas may be combusted if the pressure and temperature are held constant?
Answer:
2H2S + 3O2 → 2SO2 + 2H2O
V(O2) = 48.4 L
p = 105 kPa = 1.036 atm
T = 190 + 273 = 463 K
Ideal gas law:
pV = nRT
n = \frac{pV}{RT}n=
RT
pV
R = 0.08206 L×atm/mol×K
n(O2) = \frac{1.036 \times 48.4}{0.08206 \times 463}=1.319 \; mol=
0.08206×463
1.036×48.4
=1.319mol
According to the reaction:
n(H2S) = \frac{2}{3}
3
2
n(O2) = \frac{2}{3} \times 1.319 = 0.8798 \;mol
3
2
×1.319=0.8798mol
V = \frac{nRT}{p} \\ V(H_2S) = \frac{0.8798 \times 0.08206 \times 463}{1.036}=32.26 \;LV=
p
nRT
V(H
2
S)=
1.036
0.8798×0.08206×463
=32.26L
Answer: 32.26 L
Explanation:
pls help ——————————
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Answer:
X has 9 Electrons, 9 Protons and 10 Neutrons
X is Fluorine
Explanation:
19 in X is Nucleon number
So, if you minus 19 by 9 down there (which is proton number) you'll get 10 (Neutron number).
Now, Proton = Electron. That's why Electron is 9 too. I figured that X is Fluorine bcuz it has 9 Electrons. If you venture around in the periodic table, fluorine is the ninth element innit.
hope this helps ya ＼(^o^)／
Someone pls help me I will make you brain
Answer:
A
Explanation:
Which of the following are directly proportional? *
volume and temperature
pressure and volume
pressure and temperature
Select the answer that completes each statement.
The
founded the Virginia colony.
The
government took over the Virginia colony because too many colonists had died.
and
worked on the tobacco plantations.
The
was the first elective governing body in a British colony.
Answer:
1 colonists
2 England
3 slaves
4 the House of Burgesses
Answer:
:)
Explanation:
Explain how heat gets transferred?
Heat can travel from one place to another in three ways: Conduction, Convection and Radiation.
In which range of electronegativity differences would polar covalent bonds occur?(1 point)
−1.0 to 0
0 to 1.0
0 to 0.5
0.5 to 1
This image shows electronegativities of elements on the periodic table. Based on this information, which element is most likely to form a strong ionic bond and take on electrons? (1 point)
fluorine (F)
cesium (Cs)
hydrogen (H)
helium (He)
Which option contains an example of a polyatomic ion?(1 point)
NH4
KNO3
CaCl2
MgCl
Which statement best explains the difference between polar and nonpolar covalent bonds?(1 point)
Polar covalent bonds give/take electrons, while nonpolar covalent bonds share electrons.
Polar covalent bonds share electrons, while nonpolar covalent bonds give/take electrons.
Polar covalent bonds share electrons unequally, while nonpolar covalent bonds share electrons equally.
Polar covalent bonds share electrons equally, while nonpolar covalent bonds share electrons unequally
Which statement describes the bonds in iron sulfate, FeSO4? (1 point)
Fe and S have an ionic bond, and S and O have ionic bonds, too.
Fe and S have a covalent bond, while S and O have ionic bonds.
Fe and S have an ionic bond, while S and O have covalent bonds..
Fe and S have a covalent bond, and S and O have covalent bonds, too.
Answer: 1. (0.5 to 1)
2. (Fluorine)
3. (KNO3
4. (Polar covalent bonds share electrons unequally, while nonpolar covalent bonds share electrons equally.)
5. (Fe and S have a covalent bond, and S and O have covalent bonds, too.)
Explanation:
Ye, have great day.
The periodic table is an arrangement of elements according to their periodic properties.
Polar covalent bonds are those compounds in which unsymmetrical electron distribution in bonds leads to polarity in the molecule. Examples of such compounds include; HCl, CHCl3, etc. A polar covalent bond occurs when the electronegativity differences between atoms lies within the range of 0.5 to 1.
Since electronegativity increases across the period and we also know that highly electropositive metals(having very low electronegativity) and highly electronegative nonmetals(having high electronegativity) form a strong ionic bond, it follows that fluorine (F) and cesium (Cs) will form a strong ionic bond.
A poly atomic ion is an ion that contains more than one atom. Given the options listed NH4^+ is an example of a polyatomic ion.
The difference between polar and nonpolar covalent bonds is that polar covalent bonds share electrons unequally, while nonpolar covalent bonds share electrons equally.
In FeSO4, Fe and S have an ionic bond, while S and O have covalent bonds.
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A molecule is made up of more than one element ?
Answer:
Yes it is
Explanation:
How else do you think nitrogen or oxygen is made?
1. Cooking pots are provided with wooden or plastic handles .Why?
Answer:
So the heat doesn't transfer to the handle and heat it up causing you to burn yourself in cooking process
Explanation:
Hope this helps! Happy Halloween
Cooking pots are provided with wooden or plastic handles because wood or plastic handles are bad conductors of heat. Hence, the heat from the hot appliances does not flow to our hands with the result that we can handle them without any difficulty.
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If the statement is true, write true. If the statement is false, change the underlined word
or words to make the statement true.
1. An element’s mass number tells the number of protons in its
nucleus.
2. Negatively charged particles in an atom are called electrons.
3. The cloud model of the atom describes the location of
electrons as specific orbits around the nucleus.
4. Atoms with the same number of protons but different numbers
of neutrons are called isomers.
5. The sum of the protons and neutrons in an atom is called the
atomic number.
6. An object that helps explain ideas about the natural world is
called a model.
Fill in the blank to complete each statement.
7. The positively charged particle of an atom is called a(n) .
8. A particle with no charge is a(n) .
9. A(n) is the particle of an atom that moves rapidly in the
cloudlike region around the nucleus.
10. The tells the number of protons in the
nucleus of every atom of an element.
11. Atoms of the same element that have the same number of protons but different
numbers of neutrons are called .
12. The sum of protons and neutrons in the nucleus of an atom is the
.
Write the letter of the correct answer on the line at the left.
13. The positively charged particle in an atom’s nucleus is the
A electron
B neutron
C proton
D isotope
14. The smallest particle an element can be divided into is the
A electron
B neutron
C isotope
D atom
15. An element’s identity can be determined from its
A atomic number
B number of neutrons
C number of isotopes
D energy levels
16. The model of the atom that described electrons scattered throughout a ball of positive charge was proposed by
A Niels Bohr
B Ernest Rutherford
C J. J. Thomson
D John Dalton
Answer:
5. An element's mass number tells the number of protons in its nucleus.
Atomic
6. Negatively charged particles in an atom are called electrons.
True
7. The cloud model of the atom describes the location of electrons as specific orbits around the nucleus.
Bohr
8. Atoms with the same number of protons but different numbers of neutrons are called isomers.
Isotopes
9. The sum of the protons and neutrons in an atom is called the atomic number.
Mass
10. An object that helps explain ideas about the natural world is called a model.
True
11. Mendeleev arranged his periodic table in order of increasing atomic number.
Mass
12. The rows in the periodic table are called periods.
True
13. Moving across the periodic table from left to right, one finds, in order, metals, then gases, then nonmetals.
Metalloids
14. Another name for a period is a family.
Group
15. On the periodic table, elements in the same column have similar properties.
True
Explanation:
how does a phenol red-containing solution look if co2 level is low?
Answer:
The variables to be examined in relation to carbon dioxide use are the amount of light exposure and amount of dissolved CO2. Phenol red is yellow/orange under acidic conditions, that is when the pH of the solution is less than 7 (e.g. pH = 6). This occurs when the concentration of CO2 is high.
Explanation:
is this correct
A phenol red-containing solution with low CO2 level will appear red.
Phenol red is a substance that serves as an indicator. It changes in colouration in response to the acidity or alkalinity of solutions.
In acidic solutions, phenol red turns yellow while the colour is red in basic solution.
Solutions with high CO2 levels are acidic while those with little to no CO2 concentrations are basic.
Thus, in a low CO2 solution, phenol red will turn red and the solution will generally appear red.
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What is the SI base unit of temperature?
Answer:
Kelvin
Explanation:
2. DEFINE CHEMICAL BOND IN YOUR OWN WORDS.
Answer:
chemical bond are bonds that are strong lasing between chemicals and irons and morecles
where on the periodic table are noble gases found?
Answer:
The farthest to the right of the Periodic Table. They have 8 valence electrons. Some Noble gases are Helium, Neon, and Argon.
Which of the following describes a chemical property of oxygen?
Oxygen is a gas at room temperature.
An oxygen molecule has an atomic mass of 32 a m u.
The density of oxygen is 0.00133 grams per centimeter cubed .
Oxygen reacts with iron to form rust.
Answer:
Oxygen Reacts with Iron to Form Rust is the Correct Answer
What makes a charged object attract an uncharged object?
The charge in both objects move around.
The charged object is positively charged.
The charges move in the uncharged object.
The uncharged object becomes negatively charged.
Answer:
its c I think C)
The reason for this is due to the phenomenon called "Charging by Induction". What that means is that when something with a charge, for example a negative charge, is brought near an uncharged one, it induces the opposite charge onto it (positive in this case) and therefore since opposites attract, it attracts it.
The reason for this is that since, just like a positive magnet rejects and pushed away like charges, the electrons hold a negative charge, they push away any electrons that may be in the neutrally charged item causing only protons to be left, thus creating an oppositely charged object. Or vice versa.
So whatever charge the object has, it induces the opposite charge into the uncharged object, causing the charges to move only in the uncharged one.
Explanation:
Earth science
Help plz!
Which piece of information could a person obtain from a contour map?
1.the mineral composition of a mountain
2. the elevation of a mountain 3.the speed of water flow in a river
4.the amount of water in a river
Answer:
2 Elevation of a mountain.
Explanation:
Contours make it possible to show the height and shape of mountains, the depths of the ocean bottom, and the steepness of slopes.
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Science is based on the correspondence theory of truth, which claims that truth corresponds with facts and reality.
Answer:
true/ correct
Explanation: