Unit Test -Chemistry of Life

All matter is made of building blocks called _____________.

• energy.

• atoms.

• electrons.

• compounds.

The positive particles of an atom are 

• electrons 
• positrons 
• neutrons 
• protons 

The central region of an atom where neutrons and protons are present is called _________.

• nucleus

• electron cloud

• core

• center

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

• negatrons 
• electrons 
• neutrons 
• protons 

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

• 6

• 12

• 3

• cannot be determined

What is the atomic number and name for an element with three protons?

• 2 - Helium

• 1 - Hydrogen

• 3 - Lithium

• 6 - Carbon

A particle that moves around the nucleus is a(n)...

• Proton
• Neutron
• Electron
• Quark

Which of the following is a negatively charged subatomic particle?

• Electron
• Proton
• Neutron
• Quark

The particles that are found in the nucleus of an atom are

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

Tags

NGSS.HS-PS1-8

The atomic number of an elements is the total number of which particles in the nucleus?

• neutrons
• protons
• electrons
• protons and electrons