A) a column
example: earth alkaline metals
Answer:
2
Explanation:
it has a total of 17 valence electrons
Answer:
8.067 g/cm^3
Explanation:
Density = Mass/Volume
where mass = 121g and....
Volume = (35 - 20) = 15ml
where 1ml = 1cm^3
So Density = 121/15
;Density = 8.067 g/cm^3
Answer:
set distances were electrons can be sensed.
Explanation:
Energy levels are set distances from the nucleus of the atom where electrons can be sensed. Electrons are small, negatively charged particles in the atom that pass through the positive nucleus in the center. The energy levels are a little like the steps of the stairs. You may stand on one step or the other, but not between the moves. The same thing goes with electrons.
hope this helped!
Column is the answer hopefully this helps
