Explanation:
An ionic compound is formed when one atom donates one or more electrons to one or more atoms of another element. Calcium has two valence electrons, which are donated to an atom of oxygen. So, an ionic compound is formed in the reaction involving one calcium atom with an oxygen atom.
Answer:
2°C.
Explanation:
Considering the thermometer used in this case, we can see that there are 5 lines counting from 0 to 10.
It therefore means that 1 line indicates 2°C.
With the above insight, the thermometer reads 2°C.
Therefore, the temperature of the water is 2°C.
<span>In a dissolving process,
energy is required to overcome the forces of attraction between the solvent
particles. The first step is for the solvent particles to move in order for
solute particles to enter the system. This process is endothermic where energy
flows into the system. The second step is when solute particles must separate
from other solute particles. Lastly, the solute should move between solvent
particles.</span>
<u><em>The answer is actually D. This is because the phenotype is really the trait that is determined by the alleles.</em></u>
I believe it is B.
Remember that heterozygous refers to having two different alleles of a gene, and that dominant traits are represented by CAPITAL letters.
In this case, B is most likely correct. If not, than it has to be C.
Good luck!
-RxL
<u><em></em></u>
Answer:
31
Explanation:
Given parameters:
Mass number = 66
Number of electrons = 35
Unknown:
Number of electrons
Solution:
In an atom, the number of protons and electrons are the same. In ions, there is a difference between the two numbers.
For this problem, once we can find the number of protons, it is therefore the number of electrons.
Mass number = number of protons + number of neutrons
Insert the parameters and solve;
66 = number of protons + 35
Number of protons = 66 - 35 = 31
So the number of electrons is 31