Unit 2: Atomic Structure

The positively charged particles of an atom are called:

• electrons 
• positrons 
• neutrons 
• protons 

What particles are found in the nucleus of an atom?

• protons and neutrons
• protons and electrons
• electrons and neutrons
• only protons

Tags

NGSS.HS-PS1-8

An atom with atomic number 6 would have how many protons?

• 6
• 12
• 3
• cannot be determined 

Particles in an atom that are neutral and have no charge are called:

• negatrons 
• electrons 
• neutrons 
• protons 

What is the atomic number for an element with three protons, three neutrons and three electrons?

• 2
• 1
• 3
• 6

In the periodic table elements are arranged by:

• atomic mass
• atomic number
• number of electrons
• number of isotopes

What does the 1.00794 stand for?

• mass number
• atomic number
• average atomic mass
• atomic explosion

Tags

NGSS.HS-PS1-1

Ions are: 

• atoms with a positive or negative charge
• atoms with no charge
• atoms with ONLY a positive charge
• atoms with ONLY a negative charge

An atom of beryllium has 4 protons, 5 neutrons and 6 electrons. What is its charge? 

• 0 (neutral)
• +2
• -2
• -1

An atom of beryllium has 4 protons, 5 neutrons and 6 electrons. What is its mass number? 

• 4 amu
• 9 amu
• 11 amu
• 1 amu