1
2
3
4
5
100

the smallest particle is called 

a quark

100

subatomic particle with a negative charge

electron

100

subatomic particle with a positive charge

proton

100

If an atom has a mass number of 35, will the protons and neutrons be equal?

 no


100

change in mass is called

isotope

200

subatomic particles

protons, neutrons, electrons

200

change in electrons

ion

200

a tiny piece of matter that cannot be divided

atom

200

what is the symbol for the element Lead

Pb

200

how many metalloids are on the periodic table

7

300

how many valence electrons does an alkaline earth metal have

2 (dots)
300

in a neutral atom, the number of protons equals the number of 

electrons

300

the name for the rows in the periodic table

periods

300

how many nonmetals are on the periodic table

18

300

the name for columns in the periodic table

groups

400

what makes an element distinct

protons

400

at room temperature, none of the metals are

gases

400
what period are elements 57-71 a part of

period 6

400

cloud model maximum on innermost shell

two

400

how many elements are on the periodic table

118

500

element symbol with the highest mass

Og

500

atoms of the most reactive elements are in which groups?

group 1 and group 7

500

the locations of electrons in atoms is shown on what model

cloud model

500

Mendeleev left spaces for elements that were

unknown and similar to those already discovered 

500

how does reactivity change in group 1 (alkali metals)

more reactive as it goes down