1. match the description to the word:
1. vertical columns
2. horizontal rows
choices: periods or groups
2. marcus discovered that sodium (na) is found in group 1, period 3 on the periodic table. where should marcus look to find another element that has similar properties to those of sodium?
a. on the opposite side of the periodic table
b. in group 1
c. at elements whose symbols begin with the letter n
d. in period 3
3. as one goes down vertically in a group in the periodic table, which of the following is true?
a. the number of protons in each element decreases
b. the atomic mass increases
c. the number of protons in each element increases
d. the atomic mass decreases
4. why do noble gases almost never form chemical bonds?
a. they are very rare
b. they have filled outer valence shells
c. it is difficult for gases to form bonds
d. they have very small atomic radii
5. the noble gases include which of the following sets of elements?
a. f, cl
b. o, s
c. h, he
d. ar, kr
6. what do group numbers on the periodic table identify?
a. the number of neutrons in atoms.
b. the number of valence electrons in atoms.
c. the total number of electrons in atoms.
d. the number of protons in atoms.
7. which of the following statements about cobalt (co) and nickel (ni) is true?
a. nickel has a greater average atomic mass than cobalt does.
b. nickel atoms have more protons than cobalt atoms do.
c. cobalt and nickel belong to the same group on the periodic table.
d. cobalt atoms have more electrons than nickel atoms do.
8. the pictures show two elements from the periodic table.
these two elements have similar properties and behave the same in a chemical reaction. how should they be placed on the periodic table?
a. they should be placed in the same period with k on top and na below.
b. they should be placed in the same period with na on top and k below.
c. they should be placed in the same group with k on top and na below
d. they should be placed in the same group with na on top and k below.
9. which of following explains the location of oxygen (o) on the periodic table?
a. it has one less proton than nitrogen (n), so it is located after nitrogen (n), and it is a metal, so it is located on the right side of the periodic table.
b. it has one more proton than nitrogen (n), so it is located after nitrogen (n), and it is a non-metal, so it located on the right side of the periodic table.
c. it has one more proton than nitrogen (n), so it is located after nitrogen (n), and it is a metal, so it is located on the right side of the periodic table.
d. it has one less proton than nitrogen (n), so it is located after nitrogen (n), and it is a non-metal, so it is located on the right side of the periodic table.
10. which of the following statements is correct for the elements shown?
a. atomic number decreases as you move down the column.
b. sodium has the least atomic mass.
c. atomic mass increases as you move down the column.
d. lithium has the greatest atomic number.
11. which of the following statements best describes the outer electrons in atoms of the elements shown?
a. lithium atoms have 7 outer-level electrons, sodium atoms have 23, and potassium atoms have 39.
b. the atoms of each element have 1 outer-level electron.
c. lithium atoms have 3 outer-level electrons, sodium atoms have 11, and potassium atoms have 19.
d. the atoms of each element have 11 outer-level electrons.
12. the atoms below are all located in group 18 on the periodic table. the atoms in group 18 are considered noble gases. what makes these atoms unique and "noble? "
a. noble gases are all missing only one electron, so they are more reactive.
b. noble gases all have a full outer shell, so they are not likely to bond with other atoms.
c. noble gases all have a full outer shell, so they are more reactive.
d. noble gases are all metals at room temperature and tend to have different numbers of valence electrons.
13. read the passage about the periodic table.
periodic table
the elements on the periodic table are arranged according to increasing atomic number. the elements are arranged in periods and groups. elements in the same group behave similarly in chemical reactions because they have similar properties.
which list of elements will behave similarly in a chemical reaction?
a. lithium (li), boron (b), oxygen (o)
b. lithium (li), sodium (na) potassium (k)
c. potassium (k), bromine (br), krypton (kr)
d. sodium (na), magnesium mg), lithium (li)