The model of the atom has dramatically changed over many many years.We learned atoms make up different substances and are the smallest particles of matter, which have subatomic particles that are very small portions of matter. At first scientist only thought there were electrons which are negatively charged.
Answer:
B
Explanation:
B. There are two atoms of Nitrogen and two atoms of Hydrogen combined to make Ammonia.
If it loses an electron, it will become an ion.
The rows are the one line of elements that goes from left to right horizontally. A column is a line of elements that goes vertically.
Answer:
97.78% KCl in the original sample
Explanation:
