Science Quiz 3

Click for the correct symbol for the radioactive isotope known as Carbon 14.

14/6 C

Click for the correct symbol for the Chlorine 37 isotope.

37/17 C1

The atomic mass of carbon-13 is 13. It has six protons. How many neutrons does this isotope have?

7

It is possible for a particular element to have various numbers of neutrons. True or False

True

The exact structure of the atomic nucleus is unknown to scientists. True or False

True

Isotopes of elements have different _____.

atomic masses

Beta particles cannot penetrate very far into solids because they:

have negligible mass

The atomic mass of an element is equal to the number of:

protons plus neutrons

Why can't alpha particles penetrate deeply into solids?

Alpha particles have low velocity.

Chlorine is a metal. True or False

False

Why can gamma rays pass through or penetrate solids?

Gamma rays have high velocity. Gamma rays have no mass.

Any element can always be identified by its ______.

number of protons atomic number

All atoms of the same element have the same number of _____.

protons