Question 1

How many protons, electrons, and neutrons, respectively, does 45Sc2+ have?

Accepted Answer

A)   21, 19, 24
B)   21, 21, 24
C)   19, 21, 26
D)   21, 19, 45
E)   19, 21, 24 A

Question 2

How many protons are in the nucleus of a Mg atom?

Accepted Answer

A)   12
B)   24
C)   25
D)   36
E)   variable A

Question 3

Which of the following is a noble gas?

Accepted Answer

A)   Ar
B)   N2
C)   H2
D)   O2
E)   CO2 A

Question 4

The symbol for aluminum is

Accepted Answer

A)   A
B)   Am
C)   Al
D)   Au
E)   An

Question 5

The symbol for the element boron is

Accepted Answer

A)   B
B)   Bn
C)   Be
D)   Bor
E)   Bm

Question 6

Identify each of the following.
a. The heaviest noble gas
b. The transition metal that has 24 electrons as a +3 ion
c. The halogen in the third period
d. The alkaline earth metal that has 18 electrons as a stable ion

Accepted Answer

The answer of Identify each of the following.
a. The heaviest...

Question 7

The symbol for copper is

Accepted Answer

A)   Cr
B)   C
C)   Co
D)   Cu
E)   none of these

Question 8

An atom that has 54 protons, 54 electrons, and 78 neutrons is

Accepted Answer

A)   
B)   
C)   
D)   
E)

Question 9

How many electrons are present in a tin atom with a mass number of 119?

Accepted Answer

A)   50
B)   119
C)   169
D)   69
E)   6.02 *1023

Question 10

Which of the following statements is/are true? I. John Dalton provided the first experimental support for the atom.
II) Ernest Rutherford proved the existence of a nucleus by shooting positively charged particles at a thin gold-foil sheet.
III) J. J. Thompson proved that electrons travel in elliptical orbits around the nucleus.
IV) Energy in an atom is quantized, so when electrons fall to their ground state, white light can be observed.

Accepted Answer

A)   I, II
B)   I, III
C)   I, II, III
D)   II, IV
E)   All of the above statements (I - IV)  are correct.

Question 11

The number of protons in  is

Accepted Answer

A)   80
B)   120
C)   200
D)   dependent on ionic charge
E)   unknown

Question 12

How many electrons are present in a fluorine, F, atom?

Accepted Answer

A)   9
B)   10
C)   11
D)   18
E)   19

Question 13

An element's most stable ion forms an ionic compound with chlorine having the formula XCl2. If the ion of element X has a mass of 89 and 36 electrons, what is the identity of the element, and how many neutrons does it have?

Accepted Answer

A)   Kr, 53 neutrons
B)   Kr, 55 neutrons
C)   Se, 55 neutrons
D)   Sr, 51 neutrons
E)   Rb, 52 neutrons

Question 14

How many nitrogen atoms are indicated by the formula Al(NO2)3?

Accepted Answer

A)   3
B)   1
C)   6
D)   4
E)   0

Question 15

Which of the following statements are true? I. Models are always wrong unless they are proved by a theory.
II) Elements, such as lead, are made of tiny particles that mostly consist of open space.
III) The air you breathe is an example of a heterogeneous mixture.
IV) Because NH3 always contains the same relative numbers of atoms, it will always contain 4.6 g of nitrogen for every 1.0 g of hydrogen.

Accepted Answer

A)   II only
B)   II, IV
C)   I, II, IV
D)   I, III
E)   All of the above statements are true.

Question 16

Write the name for K. ______________

Accepted Answer

The answer of Write the name for K. ______________...

Question 17

The symbol for the element zinc is

Accepted Answer

A)   Zn
B)   Z
C)   Zi
D)   Zc
E)   Zin

Question 18

Give the symbol and number of neutrons for an element with atomic number 26 and mass number 56.

Accepted Answer

The answer of Give the symbol and number of neutrons...

Question 19

How many atoms of hydrogen are in five molecules of C5H6Cl?

Accepted Answer

A)   30
B)   5 x 1023
C)   6
D)   10 x 1023
E)   6 x 1023

Question 20

The symbol Sn stands for the element

Accepted Answer

A)   sulfur
B)   strontium
C)   silicon
D)   tin
E)   sodium

Exam 4: Chemical Foundations: Elements, Atoms, and Ions

How many protons, electrons, and neutrons, respectively, does ⁴⁵Sc²⁺ have?

How many protons are in the nucleus of a Mg atom?

Which of the following is a noble gas?

The symbol for aluminum is

The symbol for the element boron is

Identify each of the following. a. The heaviest noble gas b. The transition metal that has 24 electrons as a +3 ion c. The halogen in the third period d. The alkaline earth metal that has 18 electrons as a stable ion

The symbol for copper is

An atom that has 54 protons, 54 electrons, and 78 neutrons is

How many electrons are present in a tin atom with a mass number of 119?

The number of protons in is

How many electrons are present in a fluorine, F, atom?

An element's most stable ion forms an ionic compound with chlorine having the formula XCl₂. If the ion of element X has a mass of 89 and 36 electrons, what is the identity of the element, and how many neutrons does it have?

How many nitrogen atoms are indicated by the formula Al(NO₂) ₃?

Write the name for K. ______________

The symbol for the element zinc is

Give the symbol and number of neutrons for an element with atomic number 26 and mass number 56.

How many atoms of hydrogen are in five molecules of C₅H₆Cl?

The symbol Sn stands for the element

Exam 4: Chemical Foundations: Elements, Atoms, and Ions

How many protons, electrons, and neutrons, respectively, does 45Sc2+ have?

How many protons are in the nucleus of a Mg atom?

Which of the following is a noble gas?

The symbol for aluminum is

The symbol for the element boron is

Identify each of the following. a. The heaviest noble gas b. The transition metal that has 24 electrons as a +3 ion c. The halogen in the third period d. The alkaline earth metal that has 18 electrons as a stable ion

The symbol for copper is

An atom that has 54 protons, 54 electrons, and 78 neutrons is

How many electrons are present in a tin atom with a mass number of 119?

The number of protons in is

How many electrons are present in a fluorine, F, atom?

An element's most stable ion forms an ionic compound with chlorine having the formula XCl2. If the ion of element X has a mass of 89 and 36 electrons, what is the identity of the element, and how many neutrons does it have?

How many nitrogen atoms are indicated by the formula Al(NO2) 3?

Write the name for K. ______________

The symbol for the element zinc is

Give the symbol and number of neutrons for an element with atomic number 26 and mass number 56.

How many atoms of hydrogen are in five molecules of C5H6Cl?

The symbol Sn stands for the element

How many protons, electrons, and neutrons, respectively, does ⁴⁵Sc²⁺ have?

An element's most stable ion forms an ionic compound with chlorine having the formula XCl₂. If the ion of element X has a mass of 89 and 36 electrons, what is the identity of the element, and how many neutrons does it have?

How many nitrogen atoms are indicated by the formula Al(NO₂) ₃?

How many atoms of hydrogen are in five molecules of C₅H₆Cl?