Answer:
the statement is or are true for all chemical reaction is false
Explanation:
if you think the answer is correct then mark me as brain list
Who described the atom as being like plum pudding?
A) Robert Millikan
B) J. J. Thomson
C) Niels Bohr
D) Ernest Rutherford
Answer:
B
Explanation:
J.J. Thomson
The plum pudding model is an early 20th century model of an atom. It was later found to be wrong. It was proposed by J.J. Thomson in 1904, after the electron had been discovered, but before the atomic nucleus was discovered.
can someone answer this question
Answer:
there is only one electron in the outer shell of lithium.
Explanation:
i looked it up. ,(^w^)>
What if you broke off a piece of cement (or bread) so that it was only half the volume of the original piece? What would happen to
the mass?
Answer:
The mass is also half of the mass of the original piece
Explanation:
Recall that the volume of a substance is defined as mass/volume. The density of substances is a constant. Hence, if a break off a piece of cement or bread such that what remains is only half the volume of the original piece, the mass of the new piece must also reduce to half of the mass of the original piece so that the volume of the material will remain constant.
Hence the answer above.
In a given chemical reaction, the energy of the products is less than the energy of the reactants. Which statement is true for this chemical
reaction?
A Energy is absorbed in the reaction.
B.
Energy is released in the reaction.
О с.
There is no transfer of energy in the reaction.
D. Energy is lost in the reaction.
to make an aqueous solution of 0.223 M magnesium bromide, using a 250 mL volumetric flask. How much solid magnesium bromide should you add?
Answer:
Ok
Explanation:
What compounds would you use for a ceramic baking dish
After eating a meal, blood sugar levels are elevated.The body secretes hormones to help absorb excess sugar into cells and return blood sugar levels to normal.This is an example of
1.excretion
2.regulation
3.synthesis
4.reproduction
2. regulation
it is controlling the blood sugar levels
HEAT ONLY FLOWS UPWARD; TRUE OR FALSE?
Answer:
it would be false. It doesn't only flow upward
Explanation:
Where can Earth's atmosphere be heated by conduction?
Answer:
in the troposphere
Explanation:
Colby wants to learn more about the feeding habits of ants.
What steps should Colby take to best study the feeding patterns of ants?
a. form a hypothesis, conduct an experiment, record data, make a conclusion
b. conduct an experiment, form a hypothesis, make a conclusion, record data
c. form a hypothesis, record data, conduct an experiment, make a conclusion
d. record data, form a hypothesis, make a conclusion, conduct an experiment
Answer:
a. form a hypothesis, conduct an experiment, record data, make a conclusion
Explanation:
Performing scientific investigations involved following the SCIENTIFIC METHOD, which is a rule or guideline followed in order to discover knowledge about natural phenomena. The scientific method has been divided into steps viz:
- Making observation/asking questions: In this case, the problem is HOW ANTS FEED.
- Formulating hypothesis: The hypothesis is a testable explanation given to solve the asked question.
- Testing hypothesis: The hypothesis must be able to be tested via conducting an experiment.
- Analyze result: The results of the test is recorded and analysed as data.
- Make conclusions: The conclusion either accepts or rejects the hypothesis depending on the result of the experiment.
Therefore, based on this; form a hypothesis, conduct an experiment, record data, make a conclusion are the steps Colby should take to best study the feeding patterns of ants
ASAP MULTIPLE CHOICE WILL MARK BRAINLIEST
An atom of rubidium has 37 protons and 48 neutrons. The atom loses one electron.
What will be the charge on the ion that forms?
36
+1
−36
−1
Answer:
+1
Explanation:
Answer:
-136Step-by-step explanation:
"Loses" means subtraction, decrease, or negative. So, a loss of 1, can also be represented by -1.If protons and electrons can be represented by the same number (37), then a loss of 1 is just, 37 - 1. 37 - 1 = 36.I hope this helps!
The current knowledge concerning cells is the result of the investigation and observations of many scientists. The work of these scientists forms a well accepted body of knowledge about cells. This body of knowledge about cells. This body of knowledge is an example of
The question is incomplete; the complete question is;
The current knowledge concerning cells is the result of the investigations and observations of many scientists. The work of these scientists forms a well-accepted body of knowledge about cells. This body of knowledge is an example of a
(a) hypothesis
(b) controlled experiment
(c) theory
(d) research plan
Answer:
theory
Explanation:
In the scientific method, every scientific investigation begins with observation. After observing the phenomenon, the researcher puts out an intelligent guess that explains his/her observation. This intelligent guess is known as a hypothesis.
This hypothesis is now subjected to carefully designed experiments which may prove or disprove the hypothesis. If the results of the study is well received among the scientific community, the hypothesis becomes a theory.
Hence, a well-accepted body of knowledge about any subject of study in science is an example of a theory.
Is there a common pattern for valence electrons on the periodic table
Answer:
For neutral atoms, the number of valence electrons is equal to the atom's main group number. The main group number for an element can be found from its column on the periodic table. For example, carbon is in group 4 and has 4 valence electrons. Oxygen is in group 6 and has 6 valence electrons.
Explanation:
What units do scientists use to measure temperature and time?
Answer:
Scientists commonly use two equivalent units of temperature, the degree Celsius and the kelvin.
Explanation:
How many moles would there be in 1.5x10^24 molecules of water?
Answer:
5.85 moles
Explanation:
Moles in (3.52 X 10^24) molecules of water. 3.52 x 10^24 molecules x `1mol/6.02 x 10^23 molecules = 5.85 moles of H2O.
give at least five insights that you learn from this lesson, as your way of recognizing the uniqueness of earth as a planet life
Answer and Explanation:
The lesson about the uniqueness of the earth allowed me to realize that the earth is the only planet that has drinking water and oxygen, thus allowing the existence of life on the planet and showing that we would not fully survive on another planet.
The lesson also shows that the earth is the only planet where rotation is capable of causing seasonal differences in different parts of the globe. This is important for several things, including food production and plant growth.
Another factor that shows the uniqueness of the land is its favorable temperature for life, allowing us to have water and to be able to live outdoors, for example. This factor is worrying, since the holes in the ozone layer have caused changes in this temperature.
I was also able to learn about the gravity of the earth, which is the only thing that allows us to do all the activities we do and allows us not to be launched into space. In addition, gravity has a strong influence on seas and agriculture.
Finally, I was able to learn about the tectonic plates, which provide the movement of our crust and influence in several geological processes.
Where does DNA come from?
Answer:
The DNA can be found in the cell's nucleus and beside the DNA in the nucleus, humans and other complex organisms also have a small amount of DNA in cell structures known as mitochondria.
Explanation:
Hope this helps!
Answer:
In eukaryotic cells, it is in the nucleus. In prokayrotic cells it is in the nuclei. It is made of chromosomes passed down from parents
Explanation:
Hope this helps, good luck!
Describe the relationship between a boiling point and hydrogen bonds in a substance.
Hydrogen bonding between molecules(inter mlecular) is one such attractive force. ... In water because of the hydrogen bonding attraction between molecules greater energy is needed to separate them from against their inter molecular attraction, therefore higher boiling point.
The boiling points of molecules with hydrogen bonds will always be higher than those of molecules of similar size without an -O-H or -N-H group.
What is hydrogen bonding ?
When a hydrogen atom bonded to a strongly electronegative atom is in close proximity to another electronegative atom with a single pair of electrons, the hydrogen bond is an intermolecular force (IMF) that results in a unique type of dipole-dipole attraction. There are forces between molecules called IMFs. Dipole-dipole interactions and dispersion forces are two additional examples. While true covalent and ionic bonds are stronger than hydrogen bonds, dipole-dipole and dispersion forces are generally weaker.An organic molecule with an -OH group is called an alcohol. Hydrogen bonds can occur in any molecule that has a hydrogen atom directly attached to an oxygen or nitrogen. When hydrogen is bonded to fluorine, hydrogen bonds also occur, but other molecules lack the HF group. The molecules become as a result of the hydrogen bonding, requiring more heat (energy) to separate. The boiling point of various molecules, which is the temperature at which a phase change from liquid to gas takes place, can be examined using this phenomenon.The ethanol's hydrogen bonding has raised its boiling point by about 100°C. It is essential to comprehend that van der Waals attractions are not the only forms of hydrogen bonding. For instance, each of the molecules that follow has the same number of electrons, and the two that follow have chain lengths that are comparable. Because of the additional hydrogen bonds, the butan-1-ol has a higher boiling point.To know more about hydrogen bonding check this:
brainly.com/question/17217742
#SPJ2
what element is found in group 6 and period 4? Based on its location, is the element more similar to tungsten or to iron?
the asnwer is berlinuim become a power geek like me plz itl help u
In a periodic table, there are seven periods and eighteen groups. The element found in group 6 and period 4 is similar to Tungsten.
Periodic table:The elements are arranged in order of an increasing atomic number. They are placed in the respective groups and periods according to their properties and atomic number.
The element belonging to group 6 and fourth period is Chromium and this element is similar to Tungsten as they both belong to same group.
The elements belonging to same groups are chemically similar. Thus, the answer is Tungsten (W).
Find more information about Periodic table here:
brainly.com/question/15987580
Which properties of matter are independent of the amount of the material?
Answer:
Only physical properties, cause physical properties has to have mass, weight, volume, etc
How many electrons will a neon (Ne) atom have when it has no charge?
Answer:
hope it helps you
Explanation:
Once one shell is full, the next electron that is added has to move to the next shell. So... for the element of NEON, you already know that the atomic number tells you the number of electrons. That means there are 10 electrons in a neon atom.
Can someone help me with this please ASAP?
If an atom is neutrally charged the number of electrons equals
Answer:
The number of protons
Explanation:
Answer:
number of negative electric charger
explanation
(the electrons ) and positive electric charges (the protons). The total electric charge of the atom is therefore zero and the atom is said to be neutral .
differentiate homogeneous and heterogeneous mixtures
Answer:
HOMOgeneous = Same/Alike
HETEROgeneous = Diversity/Different
In mixtures:
Homogeneous would be defined as the evenly proportion substance/materials placed throughout the sample, while heterogeneous is the maintain of separate materials/substances throughout the sample.
Never change a subscript to balance an equation
True or False
What is a common event due to transform plate movement at the San Andreas Fault Zone?
Answer:
Earthquakes
Explanation:
took the test
Answer:
earthquake
Explanation:
me and that other guy took the test
An element has an atomic number of 76. The number of protons and electrons in a neutral atom of the element are _______
Answer:
the number of protons in neutral atom is 8 not sure I did it but I forgot the answer I think that's it
What will most likely happen in the absence of a nucleus?
Answer:
Nucleus is the brain of the cell and controls most of its functions. Thus without a nucleus, an animal cell or eukaryotic cell will die.
Answer:
A. genetic information will not be transmitted by the cell
Explanation:
Suppose Highlinium-308 can also undergo positron emission
to produce the new element Burienium. What is Burienium's atomic number?
Answer:
The atomic number of burienium will be 307.
Explanation:
During positron emission proton is converted into the neutron and one electron neutrino with positron is released. It means the atomic number will be reduce by one and atomic mass remain same.
For example:
²³Mg₁₂ → ₁₁Na²³+ e⁺+ Ve
Similarly, when highlinium-308 undergoes positron emission the new element burienium is produced and the atomic number will be 307 while atomic mass remain same.
Properties of beta radiations:
Beta radiations are result from the beta decay in which electron is ejected. The neutron inside of the nucleus converted into the proton an thus emit the electron which is called β particle.
The mass of beta particle is smaller than the alpha particles.
They can travel in air in few meter distance.
These radiations can penetrate into the human skin.
The sheet of aluminium is used to block the beta radiation
ASAP MULTIPLE CHOICE WILL MARK BRAINLIEST
Which term is defined as the mass of an atom based on the mass of an atom of carbon-12?
atomic charge
atomic mass
isotope
atomic number
Answer: atomic mass
Explanation: Mass is equal to one twelfth the mass of an atom of carbon-12