Unit 1--Atoms Retest

Which particles would you find in the nucleus of an atom?

• protons and neutrons

• electrons and protons

• electrons only

• neutrons and electrons

Which subatomic particle(s) would be found orbiting around the nucleus?

• electrons and protons

• neutrons only

• protons and neutrons

• electrons only

What is the atomic mass of an atom with seven protons, seven neutrons, and eight electrons?

• 15

• 7

• 8

• 14

Which of the following properties uniquely identifies every element?

• Number of valence electrons

• Phase at room temperature

• Number of protons

• Charge of the atom

Molybdenum has an atomic number of 42. This means that molybdenum –

• has a freezing point of 42° Fahrenheit.

• belongs to Group 42 on the Periodic Table.

• can form 42 bonds with other atoms.

• contains 42 protons in its nucleus.

True or False? Neutrons have a negative charge

• True
• False

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

• 14
• 7
• 15
• 18

Tags

NGSS.MS-PS1-1

The positive particles of an atom are 

• electrons 
• positrons 
• neutrons 
• protons 

electrons have this type of charge?

• negative
• positive
• neutral

Tags

NGSS.MS-PS2-3

The nucleus of an atom can be described as:

• spacious and negatively charged
• dense and positively charged
• spacious and positively charged
• dense and negatively charged

Tags

NGSS.HS-PS1-8