Answer:
18
Explanation:
The s-, p-, and d-block elements of the periodic table are arranged into 18 numbered columns, or groups.
red having the frequency of 4.62 and at its limit 4.29 has the lowest frequency. It is the lowest before orange which has 5.00.
Answer:
as temperature cools density increases
Explanation:
Density is the ratio of mass to volume. When the temperature varies, the volume of the liquid changes. ... Also, cooling a substance causes molecules to slow down and get slightly closer together, occupying a smaller volume that results in an increase in density.
Protons are the representative particles of elements, ionic compounds, and covalent compounds.
