Chemistry Quiz 2

A material that can easily be hammered into different shapes

• has luster.

• is ductile.

• is malleable.

• is brittle.

The first person to suggest the existence of periodicity among the elements was

• J.J. Berzelius.

• Rutherford.

• Bohr.

• Mendeleev.

Of the following elements, the one that is not an example of a noble gas is

• neon.

• argon.

• oxygen.

• radon.

All atoms of the same element have the same

• atomic number.

• atomic mass.

• number of neutrons.

• shape.

The energy levels of an atom contain

• protons.

• electrons.

• neutrons.

• protons and neutrons.

Which species has 18 electrons?

• _³²S^-2

• ₂₇Al⁺³

• ₆₄Cu⁺²

• ₃₉K

Which species is an isotope of ₃₉Cl?

• ₄₀Ar⁺¹

• ₃₄S^2-

• ₃₆Cl^-1

• ₈₀Br

The second energy level of an atom can hold

• 32 electrons.

• 8 electrons.

• 18 electrons.

• 2 electrons.

The proper formula for the hydronium ion is

• H₃O⁺

• NH₄⁺

• OH^-1

• H^-1

In the periodic table, the rows are called __________ and the columns are called __________.

• octaves, groups.

• staffs, families.

• rows, groups.

• periods, groups.