Atomic Models
Protons and Neutrons
Ionic Compounds
Ions
Anything Goes
100

This scientist proposed that atoms of elements could combine in whole number ratios to form compounds.

John Dalton

100

True or false:

Protons and electrons have opposite charges but the same mass.

False


100

In an ionic compound the positive and negative charges must be

equal

100

A cation has what charge?

Positive

100

Of the following elements which exists as a diatomic?

Helium,  Sulfur,  Iodine,  Sodium, Tin

Iodine

200

J. J. Thomson discovered the electron using this famous experiment.

The cathode ray experiment

200

These two atoms are called

40/20Ca 

39/20Ca

Isotopes

200

Atoms in group 13 on the periodic table form ions with this charge.

+3

200

An atom can form a cation by

Losing electrons

200

Name the element in period 5 on the periodic table that is an alkaline earth metal.

Strontium

300

This model of the atom is called


Plum pudding model

300

The function of neutrons in the nucleus is to

Hold the positively charged protons together

300

The formula of the compound formed between rubidium and iodine is

RbI

300

How many electrons does a sulfide ion contain?

18

300

The formula of the compound formed between sodium and nitrogen is

Na3N

400

In the gold foil experiment, Rutherford expected the alpha particles to

Go straight through the gold foil

400

Two important things are determined solely by the nucleus of an atom.  What are they?

Its identity and its mass.

400

The formula of the compound formed between barium and phosphorus is

Ba3P2

400

Atoms in this group on the periodic table do not form any ions.  Name the group.

Noble gases

400

Elements that border the staircase line on the periodic table are called

Metalloids

500

Prior to Democritus Greek philosophers thought that matter was composed of these four components.

Earth, water, fire, and air

500

The following atom has how many neutrons?

114/49 In


65

500

When an ionic compound dissolves in water its ions are free to move.  This permits the solution to

Conduct electricity

500

Which of these atoms has 18 electrons?

20/17Cl^-

39/19K^+

40/18Ar

All have 18 electrons

500

A compound with the following formula contains how many oxygen atoms?

ZrO(NO3)2

7