Protons and neutrons Ck-12

Protons carry a _____ charge.

• neutral

• positive

• negative

which of the following can attract electrons?

• neutrons

• protons

• electrons

Atoms of different (a)   can be distinguished from each other by the number of protons (atomic number) in their nucleus.

A nucleus with four protons has a total positive charge of (a)   .

Protons are made up of (a)   up quarks and one down quark.

Write the mass of a proton in terms of scientific notation.

• 1.67 x 10^-27 kg

• 1.33 x 10^-21 kg

• 9.1 x 10^-31 kg

• all of the above

Each elements has a unique number of (a)   .

Atoms containing the same number of protons, but a different number of neutrons in the nucleus are called (a)   .

What is the name of the nuclear reaction that occurs in stars where protons combine to form larger nuclei?

• transmutation

• fusion

• fission

• combustion

The charge of a proton is 1.6 x 10^-19 coulomb. Find its order of magnitude.

• 10^-19

• 10^-18

• 10¹⁷

• 10¹⁹