Atomic theory

An atom's overall charge is ________.

• positive 
• depends
• neutral 
• negative 

Tags

NGSS.MS-PS2-3

What does the nucleus of an atom contain?

• Electrons and neutrons
• Protons and neutrons
• Neutrinos and positrons
• DNA and RN

Tags

NGSS.MS-PS1-1

True or False: The majority of an atom is made up of empty space

• True
• False

Tags

NGSS.MS-PS1-1

Contributes basically no mass to an atom.

• protons
• neutrons
• electrons
• protons and neutrons

The atomic number for Oxygen is 8, so

• there are 8 protons in the atom
• the atomic mass is less than 8
• the mass of the atom is 8
• the atom is decaying

Tags

NGSS.MS-PS1-1

A compound is made of 

• at least two different elements. 
• one element 
• Two of the same element. 
• More compounds. 

A vertical column is called...

• group
• tower
• period
• crew

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

The horizontal row on the periodic table is called a

• group
• family
• period
• atomic number

Tags

NGSS.HS-PS1-1

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

• Metals
• Nonmetals
• Metalloids
• Periods

Tags

NGSS.HS-PS1-1

What is the electron configuration of Magnesium?

• 2-6
• 2-6-2
• 2-8-18
• 2-8-2