Week 2: Atomic Theory

Question 1

Ions are ________.

Accepted Answer

all of the these are correct

Question 2

Which of the following has the lowest ionization energy?

Accepted Answer

Cs

Question 3

The amu for an atom is the weighted average of all the naturally occurring isotopes.

Accepted Answer

True

Question 4

What is the mass of the single product that is formed from the reaction between 2.5 g hydrogen and 7.5 g oxygen?

Accepted Answer

10.0g

Question 5

A 3.45 gram sample of hematite (Fe2O3) that contains 2.41 grams of Fe has what percentage Fe by mass?

Accepted Answer

70%

Question 6

Which of the following is a metalloid in the third period of the periodic table?

Accepted Answer

Si

Question 7

Family name of: bromine

Accepted Answer

Halogen

Question 8

How many protons does the nucleus of the sulfur-35 isotope have?

Accepted Answer

16

Question 9

The periodic table contains more elements that are classified as non-metals than elements of any other type.

Accepted Answer

False

Question 10

How is the term "atomic number" defined for a given atom or isotope?

Accepted Answer

as the number of protons its nucleus contains

Question 11

Family name of: calcium

Accepted Answer

Alkaline earth metal

Question 12

How many protons are found in a N3- ion?

Accepted Answer

7

Question 13

Which of the following is a transition metal in the fourth period of the periodic table?

Accepted Answer

Fe

Question 14

What is the charge on a neutron, proton, and electron?

Accepted Answer

0, +1, -1

Question 15

The structure of individual atoms can roughly be described as ________.

Accepted Answer

positivelycharged center and mostly empty space

Question 16

Which of the following is a metal?

Accepted Answer

W

Question 17

A neutral atom of the isotope phosphorus-32 contains 15 protons, 17 neutrons, and 15 electrons.

Accepted Answer

True

Question 18

Family name of: potassium

Accepted Answer

Alkali metal

Question 19

Has no electrons

Accepted Answer

1H+

Question 20

Which is expected to be the most chemically similar element to phosphorus?

Accepted Answer

As

Question 21

Family name of: silver

Accepted Answer

Transition metal

Question 22

One needs to supply energy from an outside source to form a cation from a neutral atom.

Accepted Answer

True

Question 23

Group VIIIA of the periodic table contains elements that are gaseous non-metals.

Accepted Answer

True

Question 24

Which element, isotope, or ion listed below contains 35 protons, 46 neutrons, and 36 electrons?

Accepted Answer

81Br-

Question 25

Has a mass number equal to 27

Accepted Answer

27A1

Question 26

Which of the following pairs are isotopes?

Accepted Answer

199Hg and 200Hg

Question 27

How is the term "mass number" defined for a given atom or isotope?

Accepted Answer

as the sum of the protons and neutrons its nucleus contains

Question 28

What element can have a mass number of 65 and an atomic number of 29?

Accepted Answer

copper

Question 29

How many electrons are found in a Fe3+ ion?

Accepted Answer

23

Question 30

How many neutrons does the nucleus of the phosphorus-32 isotope have?

Accepted Answer

17

Question 31

Has a nuclear charge of +15

Accepted Answer

30P3-

Question 32

Family name of: xenon

Accepted Answer

Noble gas

Question 33

Has an equal number of protons, neutrons, and electrons

Accepted Answer

12C

Question 34

Which of the following has more protons than electrons?

Accepted Answer

Mg+2

Question 35

The conservation of mass law states that matter can neither be created nor destroyed during a chemical reaction.

Accepted Answer

True

Week 2: Atomic Theory

Questions 35

Week 2: Atomic Theory

Questions 35