The Periodic Table_Unit Test Review

The order of elements in the periodic table is based on

• Number of protons in the nucleus

• Nuclear charge

• Number of neutrons in the nucleus

• Number of electrons in the nucleus

Atoms of elements in the same group have the same

• Number of protons

• Number of neutrons

• Number of valence electrons

• Number of electrons

When you move from left to right on the periodic table

• Elements become less metallic

• The atomic mass of the elements decreases

• The number of neutrons in each element increases by two

• Elements become more metallic

The atomic number of each element

• Indicates the number of protons and neutrons in the nucleus

• Indicates the number of valence electrons

• Indicates the number of protons in the nucleus

• Indicates the number of isotopes of the element

An atomic nucleus has a negative charge

• Proton

• Electron

• Neutron

• Quark

The elements in group 17 are known as

• Alkali metals

• Alkaline earth metals

• Noble gases

• Halogens

When an atom takes a valence electron from another atom

• An ionic bond is formed

• A covalent bond is formed

• A polar bond is formed

• An alloy is formed

The atomic number of sodium is 11 and it has a mass number of 23. How many neutrons are in the nucleus of a sodium atom?

• 23

• 12

• 11

• 1

Atoms that gain or lose electrons are called

• Isotope

• Metal

• Ion

• Non-metal

Which of the following compounds is an example of a covalent bond?

• NaCl

• KBr

• CO2

• MgCl2