The number of valence .................... in an atom of an element is related to the element's group number in the periodic table.

• electrons

• protons

• neutrons

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Valence electrons are the electrons in the ............... occupied energy level of an element's atoms

• highest

• lowest

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

To find the number of valence electrons in an atom of a representative element, simply look at its ............... number.

• group

• period

Tags

NGSS.HS-PS1-1

................................. are diagrams that show valence electrons in the atoms of an element as dots.

• Electron dot structures

• Proton dot structures:

• Neutron dot structures:

states that “in forming compounds, atoms tend to achieve the electron configuration of a noble gas”.

• The octet rule

• The triads rule

• Hund's rule

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Atoms of nonmetals tend to lose their valence electrons.

• True

• False

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

An atom is electrically neutral because it has equal numbers of protons and electrons.

• True

• False

Tags

NGSS.HS-PS1-7

An ion forms when an atom or group of atoms loses or gains electrons

• True

• False

A positively charged ion, or a cation, is produced when an atom gains one or more valence electrons.

• True

• False

An anion is an atom or group of atoms with ................ charge.

• a negative

• a positive

• no