Intro to Microbiology

All matter is made of _________.

• energy 
• atoms 
• electrons 
• compounds 

What is at the center of every atom?

• An electron
• A compound
• A molecule
• A nucleus

The positively charged particles of an atom are the ________.

• electrons
• protons
• neutrons
• protons & neutrons

What does the nucleus of an atom contain?

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

__________ are negatively charged particles that are in the orbitals around the nucleus.

• protons

• nucleus

• neutrons

• electrons

A proton has a ___________ charge.

• positive

• negative

• neutral

• massive.

An electron has a _________ charge

• positive

• neutral

• negative

• massive

A neutron has _________ charge or is ________.

• negative ... neutral

• positive .... neutral

• no .... negative

• no ... neutral

How are ionic bonds formed?

• Transfer of electrons
• Sharing of electrons

Why do elements bond?

• To be friends
• To create a new element
• To become stable