Question 1

The number of valence electrons found in an atom of a Group A element is equal to

Accepted Answer

A) its atomic number. 
B) its mass number. 
C) its group number. 
D) eight. 
E) eight minus the group number. 
A) its atomic number. 
B) its mass number. 
C) its group number. 
D) eight. 
E) eight minus the group number.

Question 2

Ionization energy increases going down a group.

Accepted Answer

A) True 
 B)False

Question 3

The number of electron levels in a magnesium atom is

Accepted Answer

A) 1. 
B) 2. 
C) 3. 
D) 4. 
E) 5. 
A) 1. 
B) 2. 
C) 3. 
D) 4. 
E) 5.

Question 4

The smallest particle of an element that retains the characteristics of the element is a(n)

Accepted Answer

A) electron. 
B) neutron. 
C) proton. 
D) atom. 
E) nucleus. 
A) electron. 
B) neutron. 
C) proton. 
D) atom. 
E) nucleus.

Question 5

The element in this list with chemical properties similar to magnesium is

Accepted Answer

A) sodium. 
B) boron. 
C) carbon. 
D) strontium. 
E) chlorine. 
A) sodium. 
B) boron. 
C) carbon. 
D) strontium. 
E) chlorine.

Question 6

The number of electrons in the outer energy level of a neutral atom of boron (atomic number 5) is

Accepted Answer

A) 2. 
B) 3. 
C) 5. 
D) 8. 
E) 10. 
A) 2. 
B) 3. 
C) 5. 
D) 8. 
E) 10.

Question 7

Consider a neutral atom with 30 protons and 34 neutrons. The atomic number of the element is

Accepted Answer

A) 30. 
B) 32. 
C) 34. 
D) 64. 
E) 94. 
A) 30. 
B) 32. 
C) 34. 
D) 64. 
E) 94.

Question 8

The electron arrangement of any particular atom shows

Accepted Answer

A) the number of isotopes possible. 
B) a description of the shape of each energy level. 
C) the number of electrons in each energy level. 
D) a diagram of an atomic nucleus. 
E) the maximum number of electrons each energy level can hold. 
A) the number of isotopes possible. 
B) a description of the shape of each energy level. 
C) the number of electrons in each energy level. 
D) a diagram of an atomic nucleus. 
E) the maximum number of electrons each energy level can hold.

Question 9

The mass number of an atom can be calculated from

Accepted Answer

A) the number of electrons. 
B) the number of protons plus neutrons. 
C) the number of protons. 
D) the number of electrons plus protons. 
E) the number of neutrons. 
A) the number of electrons. 
B) the number of protons plus neutrons. 
C) the number of protons. 
D) the number of electrons plus protons. 
E) the number of neutrons.

Question 10

What element has the electron configuration 1s22s22p63s23p2?

Accepted Answer

A) carbon 
B) oxygen 
C) sulfur 
D) iron 
E) silicon 
A) carbon 
B) oxygen 
C) sulfur 
D) iron 
E) silicon

Question 11

What is the abbreviated electron configuration for nickel (atomic number 28)?

Accepted Answer

A) [He]2s22p3 
B) [Ar]4s23d8 
C) [Kr]4s23d8 
D) [Ar]4s24p4 
E) [Ar]3d8 
A) [He]2s22p3 
B) [Ar]4s23d8 
C) [Kr]4s23d8 
D) [Ar]4s24p4 
E) [Ar]3d8

Question 12

potassium

Accepted Answer

A) P 
B) Po 
C) Pt 
D) K 
E) Ko 
A) P 
B) Po 
C) Pt 
D) K 
E) Ko

Question 13

Write in the electronic configuration for the atom shown.
-Phosphorus

Accepted Answer

The answer of Write in the electronic configuration for the...

Question 14

Mercury is a metal.

Accepted Answer

A) True 
 B)False

Question 15

Consider a neutral atom with 30 protons and 34 neutrons. The mass number for this atom is

Accepted Answer

A) 30. 
B) 32. 
C) 34. 
D) 64. 
E) 94. 
A) 30. 
B) 32. 
C) 34. 
D) 64. 
E) 94.

Question 16

Which element would have physical and chemical properties similar to chlorine?

Accepted Answer

A) Ar 
B) Br 
C) S 
D) O 
E) P 
A) Ar 
B) Br 
C) S 
D) O 
E) P

Question 17

The number of dots in the electron dot structure of carbon is

Accepted Answer

A) one. 
B) two. 
C) three. 
D) four. 
E) five. 
A) one. 
B) two. 
C) three. 
D) four. 
E) five.

Question 18

Ionization energy is

Accepted Answer

A) the energy an ion acquires from an electron. 
B) the energy needed to remove the least tightly bound electron. 
C) highest for metals in Group 1A (1). 
D) higher for potassium than for lithium. 
E) None of the above. 
A) the energy an ion acquires from an electron. 
B) the energy needed to remove the least tightly bound electron. 
C) highest for metals in Group 1A (1). 
D) higher for potassium than for lithium. 
E) None of the above.

Question 19

A sample of silicon has three naturally occurring isotopes: Si-28 (mass 28.0 amu); Si-29 (mass 29.0 amu) and Si-30 (mass = 30.0 amu). If the average atomic mass of silicon is 28.1 amu, which isotope is the most abundant?

Accepted Answer

A) Si-28 
B) Si-29 
C) Si-30 
D) All isotopes have the same natural abundance. 
A) Si-28 
B) Si-29 
C) Si-30 
D) All isotopes have the same natural abundance.

Question 20

Identify the noble gas in the following list.

Accepted Answer

A) helium 
B) nitrogen 
C) oxygen 
D) gold 
E) chlorine 
A) helium 
B) nitrogen 
C) oxygen 
D) gold 
E) chlorine

Exam 4: Atoms

The number of valence electrons found in an atom of a Group A element is equal to

Ionization energy increases going down a group.

The number of electron levels in a magnesium atom is

The smallest particle of an element that retains the characteristics of the element is a(n)

The element in this list with chemical properties similar to magnesium is

The number of electrons in the outer energy level of a neutral atom of boron (atomic number 5) is

Consider a neutral atom with 30 protons and 34 neutrons. The atomic number of the element is

The electron arrangement of any particular atom shows

The mass number of an atom can be calculated from

What element has the electron configuration 1s22s22p63s23p2?

What is the abbreviated electron configuration for nickel (atomic number 28)?

potassium

Write in the electronic configuration for the atom shown. -Phosphorus

Mercury is a metal.

Consider a neutral atom with 30 protons and 34 neutrons. The mass number for this atom is

Which element would have physical and chemical properties similar to chlorine?

The number of dots in the electron dot structure of carbon is

Ionization energy is

A sample of silicon has three naturally occurring isotopes: Si-28 (mass 28.0 amu); Si-29 (mass 29.0 amu) and Si-30 (mass = 30.0 amu). If the average atomic mass of silicon is 28.1 amu, which isotope is the most abundant?

Identify the noble gas in the following list.

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What element has the electron configuration 1s²2s²2p⁶3s²3p²?