Investigation 1 Chem 1

If electrons in an atom have the lowest possible energies, the atom is in the

• ground state

• excited state

• inert state

• radiation-emitting state

As the atomic number increases, the number of electrons in a neutral atom

• is undetermined

• decreases

• remains the same

• increases

The first scientist to show that atoms emit tiny negative particles was

• Rutherford

• Thomson

• Kelvin

• Heisenberg

Which of the following is an element?

• sodium chloride

• water

• glucose

• carbon

The symbol for potassium is

• P

• Pt

• K

• Po

Neon-22 contains 12 neutrons. It also contains

• 10 protons

• 22 electrons

• 12 protons

• 22 protons

How many protons, electrons, and neutrons, respectively, does ¹⁶O have?

• 8, 14, 8

• 8, 10, 8

• 8, 8, 8

• 8, 18, 16

In Rutherford's experiments, most of the particles

• were absorbed by the foil

• passed thought the foil

• bounced back

• combined with the foil

What is the most abundant element found in the human body?

• oxygen

• water

• calcium

• potassium

According to Dalton's atomic theory, atoms

• of each element are identical in size, mass, & other properties

• are destroyed in chemical reactions

• can be divided

• of different elements cannot combine