General Chemistry Unit #1

Question 1

What is the Wavelength (upside down y) unit?

Answer 1

meters (m)

Question 2

What is the Frequency (v) unit?

Answer 2

Hz (1/s or s^-1)

Question 3

As wavelength increases, frequency…? Why?

Answer 3

Decreases, because the energy decreases which means the frequency isn’t as high

Longer waves = lower frequency

Question 4

As frequency increases, wavelength…? Why?

Answer 4

Decreases, because the energy increases which makes the waves of wavelength smaller so it decreases

Shorter waves = higher energy/frequency

Question 5

What happens to the energy of a photon if the Wavelength is doubled?

Answer 5

Energy is reduced by one-half (1/2)

Question 6

Red light has a _____ frequency and a _____ wavelength than ultraviolet rays.

Answer 6

lower, longer

Question 7

Energy of a photon is ______ proportional to frequency, and _______ proportional to wavelength.

Answer 7

Directly, inversely

Question 8

If the frequency of an electromagnetic wave increases, the wavelength will _____.

Answer 8

Decrease

Question 9

What is Planck’s constant?

Answer 9

(h)

Question 10

Wavelength to Energy

Answer 10

h x c/wavelength

Question 11

Frequency to energy

Answer 11

E = hv

Question 12

Wavelength to Frequency

Answer 12

v = c/wavelength

Question 13

Frequency to Wavelength

Answer 13

Wavelength = c/v

Question 14

Isotope

Answer 14

Equal numbers of protons, but different number of neutrons

Question 15

Neutral atoms of all isotopes of a given element have the same…

Answer 15

number electrons

Question 16

Which two particles of the atom have nearly identical masses?

Answer 16

Proton and Neutron

Question 17

The net charge on an atom of a given element changes as ______ are added or removed.

Answer 17

Electrons

Question 18

Mass Number

Answer 18

Protons + Neutrons

Question 19

Atomic Number

Answer 19

Protons

Question 20

Neutron amount

Answer 20

Isotope/Mass # - Protons

Question 21

Elements of which of the following groups on the periodic table always occur naturally as monatomic elements?

Answer 21

Noble gases

Question 22

Monatomic

Answer 22

A charged particle made up of a single atom

Question 23

Halogens

Answer 23

Fluorine (F), Chlorine (Cl), Bromine (Br), Iodine (I), and Astatine (At)

Question 24

Protons

Answer 24

a stable subatomic particle occurring in all atomic nuclei, with a positive electric charge equal in magnitude to that of an electron, but of opposite sign.

Question 25

Neutrons

Answer 25

a subatomic particle of about the same mass as a proton but without an electric charge, present in all atomic nuclei except those of ordinary hydrogen.

Question 26

Electrons

Answer 26

a stable subatomic particle with a charge of negative electricity, found in all atoms and acting as the primary carrier of electricity in solids.

Question 27

Ions

Answer 27

an atom or molecule with a net electric charge due to the loss or gain of one or more electrons.

Question 28

Rutherford’s gold foil experiment determined that

Answer 28

Most of the space in an atom is empty except for a concentrated area called the nucleus.

Question 29

Which of the following statements about subatomic particles are true?

I. Protons and neutrons have charges of opposite signs but the same magnitude.
II. Protons and neutrons have about the same mass.
III. A neutral atom always has the same number of neutrons and electrons.

Answer 29

II.

Question 30

I. Protons and neutrons have charges of opposite signs but the same magnitude.
II. Protons and neutrons have about the same mass.
III. A neutral atom always has the same number of neutrons and electrons.

Answer 30

I. and III.

Question 31

Same column =

Answer 31

Chemically similar

Question 32

Ionic Bond

Answer 32

Between a metal and a nonmetal

Question 33

All halogens form ions with a -1 charge, true or false?

Answer 33

True