Review Atoms and Bonding

The positively charged particles in the nucleus of an atom are called

• Electrons

• Ions

• Neutrons

• Protons

The columns in the periodic table are referred to as

• Groups

• Periods

• Rows

• Sections

Which of the following does NOT apply to valence electrons?

• make up most of the atom’s mass

• transferred or shared in bonding

• farthest from the nucleus

• shown on electron dot diagrams

The ________________________ increases one at a time from left to right across the periodic table.

• number of possible bonds

• total number of neutrons

• atomic number

• atomic mass

Elements in Group 17, the halogen family, are very reactive because their atoms have ________________________ valence electrons.

• zero

• one

• seven

• eight

What example qualifies as a mixture?

• soil

• air

• oxygen

• gasoline

What example qualifies as a compound?

• gasoline

• oxygen

• water

• soil

Tags

NGSS.MS-PS1-1

The electron dot diagram shows the number of...

• neutrons

• valence electrons

• nucleus

• protons

Elements within a group always have the same number of _________________.

• nuetrons

• valance electrons

• nucleus

• nucleus

Most atoms become less reactive after a change to a total number of________________________ valence electrons.

• one

• eight

• seven

• six