Unit 2 Structure of Matter Test

Moving from left to right on the periodic table, how do the elements change?

• They decrease in atomic number

• They are in alphabetical order

• The change from nonmetals to metalloids to metals

• They change from metals to metalloids to nonmetals

Atoms are made of_______________.

• protons, neutrons, electrons

• protons, electrons

• protons

• neutrons

The oxygen that we breathe is a molecule made of ______ oxygen atoms.

• 4

• 3

• 1

• 2

There are _______ elements listed on the periodic table.

• 119

• 120

• 118

• 220

Elements are arranged in ______________atomic mass on Mendeleev's first periodic table.

• decreasing

• increasing

A metalloid has properties of metals and nonmetals.

• true

• false

Density is one of the three forms of matter.

• true

• false

Which tool would be most useful in measuring the volume of water?

• graduated cylinder

• flask

• tweezers

• a pan balance

In which state of matter do particles spread apart quickly in all directions?

• solid

• liquid

• gas

Which state of matter has no definite shape and does not take up a definite amount of space?

• gas

• solid

• liquid