Atoms and Elements

When two or more elements join together chemically…

• a compound is formed.

• a mixture is formed.

• a substance that is the same as the elements is formed.

• the physical properties of the substances remain the same.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

The horizontal row on the periodic table is called a

• group
• family
• period
• atomic number

A vertical column is called...

• group
• tower
• period
• crew

Which of the following is the most metallic element in period 3?

• Boron (B)
• Sodium (Na)
• Argon (Ar)
• Silicon (Si)

Pure forms of these elements are stored in oil so they won't react with oxygen and water in the air.

• Alkali Metals
• Alkaline-earth metals
• Halogens
• Noble Gases

Most of the elements on the periodic table are classified as _____.

• Metals
• Nonmetals
• Metalloids
• Periods

Tags

NGSS.MS-PS1-1

___________________ are positively charged particles located in the nucleus of an atom.

• Electrons

• Neutrons

• Protons

• Isotopes

Tags

NGSS.MS-PS1-1

What do atoms of the same periodic group have in common?

• They have the same atomic number.

• They have the same chemical symbols.

• The have similar chemical properties.

• They have the same atomic mass.

The smallest particle of an element that has the same chemical properties of the element is

• a molecule of that element.

• an atom of that element.

• a proton of that element.

• the nucleus of the element.

The three kinds of elements are

• metals, nonmetals, and liquid metals

• metals, nonmetals, and metalloids

• metals, solids, and liquids

• metalloids, asteroids, and nonmetals