Periodic table

The atomic number represents the number of (a)   in an atom.

• The atomic number represents the number of protons in an atom. It is used to organize elements on the periodic table in (a)   order.

Groups contain elements that share similar (a)   properties, such as their ability to bond with other elements

Periods contain elements with the same number of (a)   (electron shells).

• Metals are typically (a)   ,  and good conductors of heat and electricity.

• Nonmetals are typically (a)   , and poor conductors.

Metalloids have properties of both metals and nonmetals

(a)  

• (a)   are positively charged and found in the nucleus.

• (a)   are neutrally charged and found in the nucleus.

(a)   are negatively charged and orbit around the nucleus in electron shells