Front

What does the PERIOD on the periodic table indicate?

Back

The PERIOD indicates the energy levels in the electron cloud.

Tags

NGSS.HS-PS1-1

Front

What determines the chemical reactivity of an element?

Back

The chemical reactivity is determined by the valence electrons.

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Front

What type of elements form ionic bonds?

Back

Ionic bonds are formed between metals and nonmetals.

Front

How many electrons does potassium (K) have?

Back

Potassium (K) has 19 electrons.

Tags

NGSS.HS-PS1-1

Front

What is the atomic number of Beryllium?

Back

Beryllium has an atomic number of 4.

Front

Define ionic bond.

Back

An ionic bond is a type of chemical bond formed through the electrostatic attraction between oppositely charged ions.

Tags

NGSS.HS-PS1-1

NGSS.HS-PS2-4

Front

What are valence electrons?

Back

Valence electrons are the electrons in the outermost shell of an atom that are involved in forming bonds.

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Front

What is the significance of the atomic number?

Back

The atomic number indicates the number of protons in an atom and determines the element's identity.

Front

What is a covalent bond?

Back

A covalent bond is a chemical bond formed when two atoms share one or more pairs of electrons.

Front

What is the difference between metals and nonmetals in terms of bonding?

Back

Metals tend to lose electrons and form positive ions, while nonmetals tend to gain electrons and form negative ions.