Review 9

What group of elements in the periodic satisfies the octet rule without forming compounds?

• Alkali Metals

• Halogens

• Noble gases

• Actinides

What is the charge of bromine ion that belongs to group 7 in the periodic table of elements?

• -1

• +1

• -2

• +2

How many electrons are gained/ lost by magnesium and what is the charge on the ion that it forms?

• loses 2 electrons to form a magnesium ion with a 2-charge

• gains 2 electrons to form a magnesium ion with a 2-charge

• loses 2 electrons to form a magnesium ion with a 2 + charge

• gains 2 electrons to form a magnesium ion with a 2+ charge

Which of the following is entitled to Erwin Schrodinger which led to the development of quantum mechanical model?

• mathematical equation

• planetary equation

• nuclear equation

• electron equation

What is the maximum number of electrons can a p orbital hold?

• 2

• 5

• 3

• 6

If the first and second energy levels of an atom are full, then what would be the total number of electrons in the atom?

• 2

• 6

• 10

• 18

Which of the following sublevels is correctly designated?

• 1p5

• 2p6

• 3f9

• 3d1

What are the orbitals present in the third principal energy level?

• s orbital

• s, p orbitals

• s, p and d orbitals

• s, p, d and f orbitals

Which among the following shows that an atom is stable?

• having 2 valence electrons

• having 4 valence electrons

• having 6 valence electrons

• having 8 valence electrons

Given this electron configuration 1s22s22p5, determine the atomic number of this element.

• 2

• 4

• 7

• 9