Chemistry Atom

What are the 3 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

What is the number of protons that the element in this image contain?

• 14

• 7

• 15

• 18

How many neutron are in the atom "K"?

• 17

• 20

• 39

• 12

Most of the mass in an atom is concentrated in the...

• electrons
• nucleus
• protons
• empty space

"C" is the element symbol for which element?

• calcium
• carbon
• chlorine
• cadmium

True or False? Neutrons have a negative charge

• True

• False

If I gain electrons I become

• Positive because I've added to my atom
• negative because I've added electrons
• same because i'm balanced
• equal because now I have electrons

Tags

NGSS.MS-PS1-1

The proper formula for magnesium hydroxide:

• MgOH

• Mg₂OH

• Mg(OH)₂

• Mg₂OH₂

How do the following two elements bond together?

Al³⁺ O^2-

• AlO

• Al₂O₃

• Al₃O₆

• Al₃O₂

An ion with a positive charge is a/an 

• anion
• cation