1. which statement about subatomic particles is not true?
protons and electrons have opposite charges.
neutrons have no electrical charge.
protons and neutrons have the same charge.
protons and neutrons have nearly the same mass.
2.
which term describes the sum of the number of protons and neutrons in an atom?

mass number

nuclear charge

atomic charge

atomic number
3.
which is not part of john dalton’s atomic theory?

all elements are composed of atoms.

atoms are made up of smaller particles.

atoms of different elements have different masses.
4.
all atoms of the same element have the same mass.
dalton’s model of an atom is best described as

a scoop of chocolate chip ice cream

a solar system

a cloud

a solid sphere
5.
who provided the first evidence that atoms contain subatomic particles?

j. j. thomson

ernest rutherford

john dalton
6.
which statement about electrons and atomic orbitals is not true?

an atom’s lowest energy level has only one orbital.

an electron has the same amount of energy in all orbitals.

an electron cloud represents all the orbitals in an atom.

an orbital can contain a maximum of two electrons.
7.
how is heavy water different from normal water?

a hydrogen atom in heavy water has an extra proton.

a hydrogen atom in heavy water has an extra neutron.

an oxygen atom in heavy water has an extra neutron.

an oxygen atom in heavy water has an extra proton.
8.
what experimental evidence did thomson use to support his hypothesis that atoms are made up of even smaller, charged particles?

the glowing beam was always deflected by charged plates.

identical particles were produced no matter which metal he used.

the particles all had the same mass as a hydrogen atom.
9.
atoms may emit light energy when

electrons move to a higher energy level

protons move to a higher energy level

protons move to a lower energy level

electrons move to a lower energy level
10.
which term describes the region in which an electron is most likely to be found?

isotope

path

orbital

cloud
11.
according to dalton, if 2 grams of element x combine with 4 grams of element y to form compound xy, how many grams of element x would combine with 28 grams of element y to form the same compound?

28

14

7

56
12.
an electron is a particle with a

positive charge, found outside the nucleus

negative charge, found in the nucleus

positive charge, found in the nucleus

negative charge, found outside the nucleus
13.
the glow of a neon light is caused by electrons emitting energy as they

move from higher to lower energy levels

collide with the nucleus

move from lower to higher energy levels

collide with other electrons
14.
to find the number of neutrons in an atom, subtract its

atomic number from its mass number

mass number from its atomic number

isotope number from its atomic number
15.
which is the best analogy describing the location of an electron in an atomic orbital?

pins on a map plotting your location every minute of a school day

the path of a bee moving from flower to flower in a garden

free-thrown basketballs bouncing on a basketball court