Science Grade 8

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1 point

A supernova creates

the plasma state of matter

a big mess

only elements lighter than Oxygen

elements heavier than iron

1 point

Rows that move across the periodic table are called

periods

families

groups

columns

1 point

What is the process in which atomic nuclei combine to form larger nuclei?

nuclear fission

supernova

nuclear fusion

chemical reaction

1 point

Beryllium has an atomic number of 4 and an atomic mass of 9.012. How many neutrons does Beryllium have?

1 point

What is the subatomic particle that carries a positive charge?

proton

neutron

plasmatron

electron

1 point

The atomic number tells you how many...

protons there are

neutrons there are

valence electrons there are

particles in the nucleus there are

1 point

Elements in the same group have this in common

same # of electrons

same # of valence electrons

same # of neutrons

same # of protons

1 point

Columns (up and down) on the periodic table are called

tables

rows

groups

periods

1 point

the person who published the first periodic table of elements was...

Albert Einstein

Dimitri Mendeleev

Democritus

Gregor Mendel

10.

1 point

Which subatomic particle carries no electric charge

proton

neutron

electron

plasmatron

11.

1 point

Alkaline Earth metals are in group

12.

1 point

To find how many neutrons are in an element, you must look at

group

the atomic mass

the atomic number

period

13.

1 point

Elements tend to be LESS reactive

toward the right side of the table

toward the bottom of the table

toward the top of the table

toward the left side of the table

14.

1 point

The Carbon family has how many valence electrons?

15.

1 point

What is the subatomic particle that carries a negative charge?

proton

plasmatron

electron

neutron

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