quiz 1- PollEv questions

What is ordinary matter?

Substances constructed from atoms

Nitrogen has an atomic number of 7. What is the maximum number of covalent bonds that a nitrogen atom could form, assuming it has no charge?

3

Scientist believe that random quantum fluctuations during inflation are responsible for the uneven distribution of matter we observe in the universe.

True

Changing the number of neutrons in an atom changes its:

Weight

You observe 20 units of a parent isotope with a half-life of ten minutes. After 10 minutes, how many units of the parent isotopes remain?

10

Select the option below with the examples of ordinary matter correctly placed in order from the largest to the smallest.

1. neutron

2. gluon

3. cell

4. CH_4

5. the brain

5,3,4,1,2