2024 SOL Review

An atom with atomic number 48 and mass number 120 contains:

• 48 protons, 48 electrons, 72 neutrons

• 72 protons, 48 electrons, 48 neutrons

• 120 protons, 48 electrons, 72 neutrons

• 72 protons, 72 electrons, 48 neutrons

An element which has a mass number of 23 and has 12 neutrons is the element:

• Lithium

• Potassium

• Magnesium

• Sodium

The nucleus of the atom has

• a high density

• a low density

• a negative charge

• no charge

An ion always contains

• unequal number of protons and electrons

• equal number of protons and electrons

• unequal number of protons and neutrons

• equal number of protons and neutrons

The ion with the charge of +1 and the same electron configuration as argon is

• potassium

• sodium

• neon

• magnesium

Atomic radii generally increases in size from __________ in the periodic table

• up a group and left to right across a period

• down a group and left to right across a period

• up a group and right to left across a period

• down a group and right to left across a period

The _____ generally have the lowest ionization energy

• noble gases

• metalloids

• nonmetals

• metals

Examine the following outer electron configuration and choose the correct location of the element it represents in the periodic table: 5s²

• row 7 column 4

• row 4 column 7

• row 5 column 2

• row 5 column 9

Sodium and potassium have similar properties because they have the same:

• atomic radius

• number of valence electrons

• ionization energy

• electronegativity

What is the maximum number of electrons that can occupy the 5p sublevel?

• 2

• 4

• 6

• 8