Chapter 1: Fundamentals of Chemistry (exam deck)

Question 1

Orbiting the central region of an atom are negatively charged

Answer 1

electrons

Question 2

Anions are ions that have a ______ net charge.

Answer 2

negative

Question 3

If the atomic number of an element is 6 and its mass number is 13, how many protons are contained in the nucleus?

Answer 3

6

Question 4

If the atomic number of an element is 6 and its mass number is 13, how many neutrons are contained in the nucleus?

Answer 4

7

Question 5

Two isotopes of an element have different ____.

Answer 5

mass number

Question 6

The principal quantum number best describes which of the following characteristics?

Answer 6

size of the electron cloud

Question 7

The electron configuration of the nitrogen atom (Z=7) is ____.

Answer 7

1s2
2s2
2p3

Question 8

In the periodic table, all of the elements in a horizontal row are referred to as ____.

Answer 8

Period

Question 9

Which of the following is an incorrect orbital notation?

Select one:

a. 4f
b. 2d
c. 3s
d. 2p
e. 5f

Answer 9

b. 2d

Question 10

What is the mass number of an atom that contains 19 protons, 19 electrons, and 20 neutrons?

Answer 10

39

Question 11

The nucleus of an atom consists of 8 protons and 6 neutrons. the total number of electrons present in a neutral atom of this element is

Answer 11

8

Question 12

Convert 3.45 x 10^-5 into decimal form.

Answer 12

0.0000345

Question 13

This is a substance that is made entirely from one type of atom.

Answer 13

Element

Question 14

An object has a mass of 10 grams and a volume of 2 mL. What is the density of the object?

Answer 14

5 g/mL

Question 15

Which element has a smaller number of electrons? Copper or Silver?

Answer 15

Copper

Question 16

Electronegativity is: (which of the following definitions?)

a. how strongly an atom pulls electrons to itself when it is bonded to other atoms
b. how much energy is needed to take an electron away from an atom
c. how large an atom is
d. the energy needed to add an electron to an atom
e. none of the choices

Answer 16

a. how strongly an atom pulls electrons to itself when it is bonded to other atoms

Question 17

Which of the following has the largest atomic radius?

Elements: C, Si, Ge, Sn

Answer 17

Sn

Question 18

Which has the lowest ionization energy?

Elements: Be, Sr, Ca, Mg

Answer 18

Sr

Question 19

Which has the highest electronegativity?

Elements: Na, Al, S, Cl

Answer 19

Cl

Question 20

Which is a possible set of quantum numbers for a valence unpaired electrons in ground state atom of chlorine (Cl)?

Select one:

a. n=3, l=1, ml=0, ms= -1/2
b. n=2, l=3, ml=1, ms=1/2
c. n=1, l=2, ml=2, ms=1/2
d. n=, l=0, ml=2, ms=1/2
e. n=3, l=5, ml=2, ms=1/2

Answer 20

a. n=3, l=1, ml=0, ms= -1/2

Question 21

What is the possible ml value for the s orbital?

Answer 21

0

Question 22

The atomic number of an atom is based upon the number of:

Answer 22

protons