Periodic Table

An atom's valence electrons are those electrons that have the highest energy.

• True

• False

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Atoms tend to be stable and nonreactive if they have six valence electrons.

• True

• False

In the periodic table, the number of valence electrons in each element decreases from left to right across each period.

• True

• False

The reactivity of metal depends on how easily it loses its valence electrons.

• True

• False

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Within each period in the periodic table, elements have similar properties because they have the same number of valence electrons.

• True

• False

The number of ______ in the atom of an element determines its chemical properties.

• protons

• neutrons

• valence electrons

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

The columns in the periodic table are called

• classes.

• metals.

• groups.

A(n) _____ shows the number of valence electrons in an atom in pictorial fashion.

• electron dot diagram

• periodic table

• balance electron

The attractive force that holds two atoms together is called a(n)

• gravitational bond.

• chemical bond.

• electrical bond.

Tags

NGSS.HS-PS1-3

Because it can either lose or share electrons when it combines with other elements, each _____ has some properties of metals and some properties of nonmetals.

• metalloid

• noble gas

• natural element