Question

What does the period number tell about the energy levels occupied by
electrons in an atom?
A. The period number tells how many electrons are in the highest
energy level of the atom.
B. The period number tells which is the highest energy level occupied
by the electrons.
C. The period number tells how many electrons are in each sublevel
of the atom.
D. The period number tells how many energy sublevels are occupied
in the atom.

Answer 1

Answer: B. The period number tells which is the highest energy level occupied by the electrons

Explanation:

• The period number ( denoted by 'n' ) is the outer energy level that is occupied by electrons in an atom.
• The period number that an element is in, is the number of energy levels that the element has.
• When we move across a period from left to right in a periodic table the number of electrons in atoms increases within the same orbit.

Thus, we can say that the period number tells which is the highest energy level occupied by the electrons in an atom.

hence, the correct option is B. The period number tells which is the highest energy level occupied  by the electrons.

Answer 2

Answer:

B

Explanation:

APEX