Atomic Structure Review

Who first proposed an atomic theory based on scientific knowledge?

John Dalto

n

Neils

Bohr

Ernest

Rutherf.

..

JJ Thomso

n

0% 0%0%0%

1. John Dalton2. Neils Bohr3. Ernest Rutherford4. JJ Thomson

Who first proposed a theory that describes how electrons exist in

energy levels?

John Dalto

n

Neils

Bohr

Ernest

Rutherf.

..

JJ Thomso

n

0% 0%0%0%

1. John Dalton2. Neils Bohr3. Ernest Rutherford4. JJ Thomson

What happens when electrons absorb energy?

They go from l..

.

They go from h...

They produce

u...

They emit lig

h...

0% 0%0%0%

1. They go from lower energy levels to higher energy levels.

2. They go from higher energy levels to lower energy levels.

3. They produce unique atomic spectra.

4. They emit light.

What happens when electrons go from higher to lower energy levels?

They emit ener..

.

They produce

u...

They emit lig

h...

All of t

he abo...

0% 0%0%0%

1. They emit energy.2. They produce unique

atomic spectra.3. They emit light.4. All of the above

Who explained the behavior of positively charged particles being deflected from a metal

foil as the nucleus?

Ernest

Rutherfo

rd

John Dalto

n

James C

hadwick

Niels

Bohr

0% 0%0%0%

1. Ernest Rutherford2. John Dalton3. James Chadwick4. Niels Bohr

A nuclear particle that has about the same mass as a proton, but with no electrical charge, is

called a(n)

nuclide.

neutron.

electron.

isoto

pe.

0% 0%0%0%

1. nuclide.2. neutron.3. electron.4. isotope.

What particle comprises about half the mass of an atom?

Positro

n

Neutro

n

Electr

on

None of t

he ab...

0% 0%0%0%

1. Positron2. Neutron3. Electron4. None of the above

Isotopes are atoms of the same element that have different

princip

al ch

emical p

rope...

masse

s.

numbers of p

roto

ns.

numbers of e

lectrons.

0% 0%0%0%

1. principal chemical properties.

2. masses.3. numbers of protons.4. numbers of

electrons.

An atom is electrically neutral because

neutrons b

alance th

e pr...

nuclear f

orces s

tabiliz

e t..

the numbers

of pro

tons..

.

the numbers

of pro

tons..

.

0% 0%0%0%

1. neutrons balance the protons and electrons.

2. nuclear forces stabilize the charges.

3. the numbers of protons and electrons are equal.

4. the numbers of protons and neutrons are equal.

The smallest unit of an element that can exist either alone or in combination with other such

particles of the same or different elements is the

electron.

proto

n.

neutron.

atom.

0% 0%0%0%

1. electron.2. proton.3. neutron.4. atom.

All isotopes of hydrogen contain

one neutron.

two electr

ons.

one proto

n.

two nucle

i.

0% 0%0%0%

1. one neutron.2. two electrons.3. one proton.4. two nuclei.

The atomic number of oxygen, 8, indicates that there are eight

proto

ns in th

e nucleus o

...

oxygen nucli

des.

neutrons o

utside th

e ox...

energy l

evels

in the oxy

g..

0% 0%0%0%

1. protons in the nucleus of an oxygen atom.

2. oxygen nuclides.3. neutrons outside the

oxygen atom's nucleus.4. energy levels in the

oxygen atom's nucleus.

The total number of protons and neutrons in the nucleus of an atom is its

atomic

number.

Avogadro

number.

mass

number.

avera

ge ato

mic mass.

0% 0%0%0%

1. atomic number.2. Avogadro number.3. mass number.4. average atomic

mass.

As the mass number of an element’s isotopes of an element increases, the number of protons

decrease

s.

incre

ases.

remains t

he same.

doubles each

time the m

a..

0% 0%0%0%

1. decreases.2. increases.3. remains the same.4. doubles each time

the mass number increases.

All atoms of the same element have the same

atomic

mass.

number of n

eutrons.

mass

number.

atomic

number.

0% 0%0%0%

1. atomic mass.2. number of

neutrons.3. mass number.4. atomic number.

The average atomic mass of an element

is th

e mass

of the m

ost ...

may n

ot equal th

e mas

s ..

cannot b

e calcu

lated.

always a

dds up to

100.

0% 0%0%0%

1. is the mass of the most abundant isotope.

2. may not equal the mass of any of its isotopes.

3. cannot be calculated.4. always adds up to 100.

An aluminum isotope consists of 13 protons, 13 electrons, and 14 neutrons. Its mass number is

13.14.

27.40.

0% 0%0%0%

1. 13.2. 14.3. 27.4. 40.

Carbon-14 (atomic number 6), the radioactive nuclide used in dating fossils, has

6 neutrons.

8 neutrons.

10 neutrons.

14 neutrons.

0% 0%0%0%

1. 6 neutrons.2. 8 neutrons.3. 10 neutrons.4. 14 neutrons.

Neon-22 contains 12 neutrons. It also contains

12 proto

ns.

22 proto

ns.

22 electrons.

10 proto

ns.

0% 0%0%0%

1. 12 protons.2. 22 protons.3. 22 electrons.4. 10 protons.

Which scientist described the existence of the neutron?

Chadwick

Thomson

Rutherfo

rd Bohr

0% 0%0%0%

1. Chadwick2. Thomson3. Rutherford4. Bohr

Which has a charge of +1?

proto

n ato

m

electron

neutron

0% 0%0%0%

1. proton2. atom3. electron4. neutron

Which element has 14 protons?

Nitr

ogen

Silic

on

Aluminum Su

lfur

0% 0%0%0%

1. Nitrogen2. Silicon3. Aluminum4. Sulfur

According to the modern concept of the atom, which are located in the nucleus of an atom?

electrons a

nd proto

ns

proto

ns only

neutrons a

nd electrons

proto

ns and neutro

ns

0% 0%0%0%

1. electrons and protons

2. protons only3. neutrons and

electrons4. protons and

neutrons

The nucleus of an atom is ____.

the ce

ntral c

ore and is

...

positive

ly charged and ...

negatively ch

arged an

d h..

negatively ch

arged an

d h..

0% 0%0%0%

1. the central core and is composed of protons and neutrons

2. positively charged and has more protons than neutrons

3. negatively charged and has a high density

4. negatively charged and has a low density

What does the number 84 in the name krypton-84 represent?

the ato

mic number

the m

ass number

the su

m of the pro

tons a

..

twice

the number o

f pr..

.

0% 0%0%0%

1. the atomic number2. the mass number3. the sum of the

protons and electrons

4. twice the number of protons

Using the periodic table, determine the number of neutrons in O.

4 8 16 24

0% 0%0%0%

1. 42. 83. 164. 24

Which of the following statements is NOT true?

Atoms o

f the sa

me eleme..

Atoms o

f isoto

pes of a

n ...

The nucleus o

f an at

om ...

Atoms a

re m

ostly empty.

..

0% 0%0%0%

1. Atoms of the same element can have different masses.

2. Atoms of isotopes of an element have different numbers of protons.

3. The nucleus of an atom has a positive charge.

4. Atoms are mostly empty space.

How is the number of neutrons in the nucleus of an atom calculated?

Add the number o

f elec..

.

Subtra

ct th

e number of ..

.

Subtra

ct th

e number of ..

.

Add the m

ass number t

o...

0% 0%0%0%

1. Add the number of electrons and protons together.

2. Subtract the number of electrons from the number of protons.

3. Subtract the number of protons from the mass number.

4. Add the mass number to the number of electrons.

Which of the following statements is NOT true?

Proto

ns have

a positive ...

Electr

ons are

negatively...

The nucleus o

f an at

om i...

Neutro

ns are

loca

ted in ...

0% 0%0%0%

1. Protons have a positive charge.

2. Electrons are negatively charged and have a mass of 1 amu.

3. The nucleus of an atom is positively charged.

4. Neutrons are located in the nucleus of an atom.

The mass number of an element is the ____.

total n

umber of s

ubatom..

weigh

ted avera

ge of t

h...

total m

ass of t

he isoto

pe...

avera

ge of t

he mass

nu...

0% 0%0%0%

1. total number of subatomic particles in its nucleus

2. weighted average of the masses of the isotopes of the element

3. total mass of the isotopes of the element

4. average of the mass number and the atomic number for the element