Atoms and Molecules

In _______________________ atomic model, negative electrons orbit the positively charged nucleus.

• Thomson’s

• Dalton’s

• Democritus’s

• Rutherford’s

In _______________________ atomic model, negative electrons were like plums in a pudding with the pudding being positive.

• Thomson’s

• Dalton’s

• Democritus’s

• Rutherford’s

In _______________________ atomic model, the atoms was indivisible.

• Thomson’s

• Dalton’s

• Bohr's

• Rutherford’s

What is the goal of all atoms?

• lose electrons.

• get a complete outer energy level

• gain electrons.

• be the most massive.

What charge is an electron?

• positive

• negative

• no charge

• none of these

What charge is an anion?

• positive

• negative

• no charge

• none of these

Which subatomic particle has a positive charge?

• proton

• nuetron

• electron

• atom

Which TWO of the following subatomic particles are inside the nucleus?

• protons

• electrons

• neutrons

• There are no subatomic particles in the nucleus of an atom.

Why is the overall charge of an atom neutral (0)?

• They have the same number of protons and neutrons.

• They have the same number of protons and electrons.

• They have the same number of electrons and neutrons.

An atom becomes _________ when it gains electrons.

• Positive
• Negative
• Neutral
• Invinsible