Deck 3: Atoms

Question 1

Rutherford's gold foil experiment showed that:

A) atoms are neither created nor destroyed.
B) atoms are mostly empty space with a very dense nucleus.
C) atoms contain electrons.
D) atoms can combine to form compounds.

Answer 1

atoms are mostly empty space with a very dense nucleus.

Question 2

The symbol for iron, as shown on the periodic table, is given here. What is the atomic number of iron?

A) Fe
B) 26
C) 55.845
D) 19.9845

Answer 2

26

Question 3

The law of conservation of _____ tells us that matter is not created or destroyed in a chemical reaction.

A) energy
B) mass
C) atoms
D) compounds

Answer 3

mass

Question 4

Which subatomic particle has the GREATEST mass?

A) a proton
B) a neutron
C) an electron
D) All of these subatomic particles have equal masses.

Question 5

Which element is NOT a metal?

A) Li
B) N
C) Sn
D) Co

Question 6

Rust has the formula Fe₂O₃, and it's made from iron metal reacting with oxygen over time. Assume that you had a 2.0-g block of pure iron metal that fully oxidized to rust and the mass of that product was 6.5 g. What must have been the mass of oxygen that initially reacted with pure iron?

A) 2.0 g
B) 6.5 g
C) 4.5 g
D) 4.0 g

Question 7

_____ allows scientists to construct images showing how atoms combine to form molecules.

A) X-ray crystallography
B) Scanning tunneling microscopy
C) Cathode ray tubes
D) Atomic theory

Question 8

Which scientist developed the periodic table?

A) Democritus
B) Dalton
C) Thomson
D) Mendeleev

Question 9

F, Cl, and Br all belong to what family?

A) alkali metals
B) transition metals
C) halogens
D) noble gases

Question 10

Which statement is NOT accurate concerning Dalton's atomic theory?

A) Elements are made of tiny, indivisible particles called atoms.
B) The atoms of each element are unique.
C) Atoms can join together in whole-number ratios to form compounds.
D) Atoms are changed in chemical reactions.

Question 11

Which elements are in the same group?

A) K, Ca, and Mg
B) Li, Na, and Cs
C) F, S, and N
D) C, Si, and N

Question 12

Which element is NOT a metal?

A) Mg
B) S
C) Sn
D) Ti

Question 13

Water has the formula H₂O. Water can be made from the reaction of hydrogen and oxygen. If 2.0 g of hydrogen reacts fully with 2.0 g of oxygen, then _____ of water is made.

A) 2.0 g
B) 3.0 g
C) 4.0 g
D) 6.0 g

Question 14

Which pair of atoms has similar chemical properties?

A) Li and Be
B) Li and Na
C) O and F
D) F and He

Question 15

Which subatomic particle has the LOWEST mass?

A) a proton
B) a neutron
C) an electron
D) All of these subatomic particles have equal masses.

Question 16

Which subatomic particle will be attracted to a positively charged metal plate?

A) a proton
B) a neutron
C) an electron
D) All of these particles will be attracted to the metal plate.

Question 17

The atomic number tells us:

A) the sum of all the particles in the nucleus.
B) the number of electrons in a neutral atom.
C) the number of protons in a nucleus.
D) both the number of electrons in a neutral atom and the number of protons in a nucleus .

Question 18

What two particles reside in the nucleus?

A) protons and electrons
B) electrons and neutrons
C) protons and neutrons
D) futons and protons

Question 19

Which subatomic particle will be attracted to a negatively charged metal plate?

A) a proton
B) a neutron
C) an electron
D) All of these particles will be attracted to the metal plate.

Question 20

Which of these symbols represents an atom with 15 protons, 16 neutrons, and 15 electrons?

A)
B)
C)
D)

Question 21

A certain element is composed of two isotopes, having the mass and abundance shown in the table. What is the average atomic mass for this element? Mass
Abundance
Isotope 1
6.0 u
7.59%
Isotope 2
7.0 u
92.41%

A) 6.0 u
B) 6.1 u
C) 7.0 u
D) 6.9 u

Question 22

Which symbol BEST represents a potassium cation?

A) K^-
B) K⁺
C) K
D) K(cat)

Question 23

Which scientist proposed that electrons orbit the nucleus like planets orbit the Sun?

A) Dalton
B) Rutherford
C) Bohr
D) Thomson

Question 24

Which symbol BEST represents a lithium cation?

A) Li(cat)
B) Li⁺
C) Li^-
D) Li

Question 25

Which symbol represents an atom with 8 protons and 10 electrons?

A) Ne^-
B) O^2-
C) Na⁺
D) Na^-

Question 26

A certain element is composed of two isotopes, having the mass and abundance shown in the table. What is the average atomic mass for this element? Mass
Abundance
Isotope 1
35.0 u
75.8%
Isotope 2
37.0 u
24.2%

A) 36.0 u
B) 35.5 u
C) 37.0 u
D) 921.9 u

Question 27

An atom that loses an electron is:

A) known as a cation.
B) known as an anion.
C) still called an atom.
D) known as an isotope.

Question 28

An atom that gains an electron is:

A) known as a cation.
B) known as an anion.
C) still called an atom.
D) known as an isotope.

Question 29

Which symbol represents an atom with 9 protons and 10 electrons?

A) Ne^-
B) Na⁺
C) Ne⁺
D) F^-

Question 30

An atom has atomic number 92 and mass number 238. Which symbol is an ISOTOPE of this atom?

A)
B)
C)
D)