IG2.1-2下学年期末复习题

How many protons does Aluminum have?

• 13

• 26

• 27

• 14

Which of the following is the correct charge of a neutron?

• Neutral

• Negative

• Positive

Which of the following is the correct charge of a proton?

• Positive

• Negative

• Neutral

An element with a mass number of 10 and an atomic number of 6 has how many protons?

• 5
• 8
• 6
• 10

Isotopes are atoms of the same element with different #’s of __________ & therefore different __________.

• neutrons ; atomic numbers

• protons ; atomic numbers

• electrons ; mass numbers

• neutrons ; mass number

All matter is made of .....

• energy 
• atoms 
• air
• chemistry

How many protons does helium have?

• 2

• 4

• 6

• 0

what is helium's atomic number?

• 2

• 4

• 6

What is helium's atomic mass?

• 2

• 4

• 6

The nucleus of an atom is made of

• electrons and protons
• electrons and neutrons
• protons and neutrons
• empty space