Structure of Matter

Question 1

The Bohr model of the atom consists of the following:

Answer 1

A dense positive nucleus surrounded electrons in definite shells.

Question 2

The nucleus of an atom contains which of the following?
Protons 
Neutrons
Electrons
Gamma rays

Answer 2

Protons and Neutrons

Question 3

Nucleons consist of which of the following?
Protons
Neutrons 
Electrons
Gamma rays

Answer 3

Protons and Neutrons

Question 4

The electron shell closest to the nucleus is termed the ____ shell.

Answer 4

K

Question 5

The third electron shell closest to the nucleus is termed the ____ shell

Answer 5

M

Question 6

The maximum number of electrons that the O shell can contain is:

Answer 6

50 (O=5….2n^2…..so 2(5^2)= 50)

Question 7

Which electron shell in an atom has the highest binding energy?

Answer 7

K

Question 8

The binding energy of the \_\_\_\_ shell in an atom is greater than that of the \_\_\_\_ shell.
L; K
L; M
M; K
N; L

Answer 8

L; M

Question 9

The electron binding energy is

Answer 9

The energy required to remove an electron from its shell.

Question 10

When an electron is removed from an atom, the atom is said to be

Answer 10

Ionized.

Question 11

The atomic mass number of an atom is

Answer 11

the number of protons and neutrons.

Question 12

The atomic number is

Answer 12

the number of protons.

Question 13

The element 11/5 B has ___ protons in its nucleus

Answer 13

5

Question 14

The element 11/5 B has an atomic mass of

Answer 14

11

Question 15

The element 11/5 B has ____ neutrons in its nucleus

Answer 15

6

Question 16

Elements in the same column in the periodic table have similar _____ properties.

Answer 16

chemical

Question 17

The number of shells of an atom determines its ___ in the periodic table.

Answer 17

period

Question 18

The number of electrons in the outermost shell of an atom is equal to its ____ in the periodic table.

Answer 18

group

Question 19

The periodic table of the elements lists the elements in order of increasing

Answer 19

atomic number.

Question 20

Isotopes are

Answer 20

atoms with the same atomic number but different mass numbers.

Question 21

The half-life of a radioisotope is

Answer 21

the time required for radioactivity to be reduced by half.

Question 22

Electromagnetic radiation includes

Answer 22

xrays

Question 23

Ionizing radiation consists of

Answer 23

Particulate radiation and electromagnetic radiation.

Question 24

The binding energy of an electron is measured in a unit called which of the following:
electron volt
eV
keV
all of the above.

Answer 24

all of the above.

Question 25

Kilovoltage is equal to ____ volts

Answer 25

1000

Question 26

Isotones have the same number of ____ bit different number of _____.

Answer 26

neutrons, protons

Question 27

Isobars have different number of ____ and different number of ___.

Answer 27

protons, neutrons.

Question 28

When two atoms share electrons it is called

Answer 28

covalent bonding.

Question 29

When an atom gives up an electron to another atom it is called

Answer 29

ionic bonding.

Question 30

X-rays and Gamma rays are often called

Answer 30

photons

Question 31

X-rays are:
emitted from nucleus of a radioisotope, or
produced outside the nucleus in the electron shells.

Answer 31

produced outside the nucleus in the electron shells.

Question 32

Gamma rays are:
emitted from the nucleus of a radioisotope, or
produced outside the nucleus in the electron shells.

Answer 32

emitted from nucleus of a radioisotope.

Question 33

X-rays and gamma exist:
at the speed of light
186, 000 miles per second
3 x10 ^8 m/s
all of the above

Answer 33

all of the above.