Atoms

The positive particles of an atom are 

• electrons 
• positrons 
• neutrons 
• protons 

the central region of an atom where most of the atom's mass can be found

• nucleus

• electron cloud

• core

• center

Tags

NGSS.MS-PS1-1

an atom with atomic number 6 would have how many protons 

• 6
• 12
• 3
• cannot be determined 

Tags

NGSS.MS-PS1-1

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

• negatrons 
• electrons 
• neutrons 
• protons 

How many protons does this atom have?

• 2.5
• 6
• 5
• 10.811

Tags

NGSS.MS-PS1-1

The first energy level can hold up to how many electrons?

• 8
• 4
• 2
• 5

Tags

NGSS.MS-PS1-1

What are the 3 subatomic particles that make-up the atom?

• protons, neutrons, and isotopes
• neutrons, isotopes, and electrons
• positives, negatives, and electrons
• protons, neutrons, and electrons

Tags

NGSS.MS-PS1-1

Which number here is my atomic number?

• 5
• 10.811

Tags

NGSS.MS-PS1-1

A section of the Periodic Table of Elements is provided. What is the chemical symbol for magnesium?

• 12
• Mg
• 24.31
• Magnesium

The atomic number tells you what?

• number of electrons
• number of protons
• number of neutrons
• both electrons and protons in an atom.