Science term 1 test

What does the Dalton atomic model look like??

Just a ball— it’s not special

What does the Thompson atomic model look like?

A circle with negative dots in them

What does the rutherford atomic model look like

It looks like a crazy galaxy thing with a circle in the middle

What does the rutherford-bohr atomic model look like

Like a circle with a bunch of more circles circling it

What does the Lewis Dot/ Lewis diagram look like

A circle with element in the middle, with up to 8 dots around them

What are the four chemical families?

Alkali metals, alkaline earth metals, halogens, Noble/inert gases

What are the characteristics of the four chemical families?

Alkali metals: soft, shiny, silver-colored metals with low melting points and low densitieshighly reactive and strong reducing agents.

Alkaline earth metals: relatively soft, have low densities, and are good conductors of electricity, moderately reactive

Halogens: highly reactive, nonmetallic, not really conductive

Noble/inert gases: colorless, odorless, and monatomic, having very low chemical reactivity due to full valence electron shells, and possessing low melting and boiling points

What’s the difference between groups/families and periods?

Periods are sorted the long way, groups/families group the chemical families

What are valence electrons?

Electrons in the last shell

What elements in the periodic table are metalloids

5, 14, 32, 33, 51, 52, 85