Physical Science Midterm Review

A neutral atom of lithium has how many electrons?

• 3

• 6

• 2

• 1

A neutral atom of which element has 13 electrons?

• Aluminum

• Boron

• Carbon

• Nitrogen

The number of electrons in a neutral atom is the same as the _____________.

__________ are shiny, malleable, ductile, and good conductors of electricity.

• metals

• nonmetals

___________ are dull, brittle, not ductile, not malleable, poor conductors of electricity.

• metals

• nonmetals

An element that is brittle, lustrous, not malleable, and conducts electricity only when cool is a ____________

• metal

• nonmetal

• metalloid

Group 18 elements are unreactive. Why?

• They have a full valence shell

• They have no valence electrons

• They combine with each other to form molecules

How many protons are in an atom of Carbon?

• 4

• 6

• 14

• 12

How many protons are in an atom of Fluorine?

• 9

• 17

• 10

• 11

How do you determine the number of neutrons in an isotope?

• protons - electrons

• mass # + atomic #

• mass # - atomic #

• atomic # + electrons