Standard 1: Atoms and the Periodic Table

How are electrons in an atom organized?

• in the nucleus

• in energy levels

• in chains

• paired with neutrons

Name group 18 on the periodic table.

• Alkali metals

• Alkaline Earth Metals

• Halogens

• Noble Gases

What information in the periodic table indicates the number of protons and neutrons in an atom?

• the element's chemical symbol

• the element's atomic number

• the element's atomic mass

• the position of the element in its column

An unkown element was recently discovered byt scientists. The element is shiny, conducts electricity, malleable, and reacts with acid. What part of the periodic table should this element be placed in?

• Metal

• Metalloid

• Nonmetal

• Noble Gas

__________ are atoms that have the same number of protons, but have different number of neutrons.

• Molecules

• Compounds

• Nucleus

• Isotopes

What is the name of the group that has the MOST reactive METALS in it?

• Alkali

• Transition metals

• Actinides

• Halogens

What is the mass number of sodium?

• 12

• 22

• 23

• 11

The subatomic particles in an atom with a positive charge is ______.

• protons

• neutrons

• electrons

Which of the following determines the identity of an element?

• atomic number

• atomic mass

• mass number

• overall charge

What is the atomic number of aluminum?

• 13

• 14

• 27

• 40