Chem - Unit 2 - Quiz 1, 2, 3

What is the atomic number of this atom?

• 1

• 3

• 4

• 7

What is the mass number of this atom?

• 1

• 3

• 4

• 7

What is the number of neutrons in tin (Sn)?

• 50

• 68

• 118

• 69

What is the average atomic mass of neon (Ne)?

• 10

• 20

• 21

• 11

Which description about the proton is accurate?

• A positively charged particle with a mass less than 0 amu

• A neutrally charged particle with a mass less than 0 amu
• A positively charged particle with a mass of 1 amu

• A neutrally charge particle with a mass of 1 amu

What is the mass number of an aluminum isotope that contains 13 neutrons?

• 13
• 26
• 27
• 26.98

What is the atomic number of an element that has 4 protons, 6 electrons, and 5 neutrons?

• 4
• 5
• 6
• 9

The only element with no neutrons in its nucleus.

• Oxygen
• Helium 
• Hydrogen
• Lithium

What is one way neutrons are different from electrons?

• they both are negative

• neutrons have no charge, while electrons have a negative charge

• Both are in the nucleus (center of atom)

• Electrons are inside nucleus and neutrons are outside the nucleus.

Atoms of the same element which have a different number of neutrons are called _________________.

• ions

• isotopes

• quarks

• molecules