Science Final 2024

Which group contains the most elements?

• metalloids

• nonmetals

• metals

• lanthanides

In an atom, the number of protons equals the number of

• nuclei

• electrons

• neutrons

• isotopes

The element in a column of the periodic table

• have similar properties

• are in the same period

• have the same atomic mass

• have very similar chemical symbols

Which group of elements shares characteristics with both metals and nonmetals?

• salts

• metalloids

• halogens

• lanthanides

Which particles in atoms have a negative electric charge?

• electrons

• protons

• neutrons

• nuclei

When an atom loses an electron, it becomes a

• positive ion

• negative ion

• neutral ion

• neutral atom

An ionic bond is the attraction between

• similarly charged ions

• oppositely charged ions

• neutral ions

• neutral atoms

Ions that are made of more than one atom are examples of

• polyatomic ions

• negative ions

• positive ions

• neutral ions

A chemical bond formed when two atoms share electrons is called a(n)

• ionic bond

• covalent bond

• polyatomic bond

• crystal bond

What is the greatest number of valence electrons?

• 2

• 3

• 8

• 12