Question

match each item with the correct statement below.
column a

1. horizontal row in the periodic table
2. vertical column in the periodic table
3. a repetition of properties occurs when elements are arranged in order of increasing atomic number.
4. type of element that is a good conductor of heat and electric current
5. type of element characterized by the presence of electrons in the d orbital
6. one - half the distance between the nuclei of two atoms when the atoms are joined
7. subatomic particles that are transferred to form positive and negative ions
8. ability of an atom to attract electrons when the atom is in a compound
9. energy required to remove an electron from an atom

column b
a. atomic radius
b. electrons
c. period
d. metal
e. ionization energy
f. transition metal
g. electronegativity
h. periodic law
i. group

Explanation:

• For 1: A horizontal row in the periodic table is called a period.
• For 2: A vertical column in the periodic table is called a group.
• For 3: The periodic law states that a repetition of properties occurs when elements are arranged in order of increasing atomic number.
• For 4: Metals are good conductors of heat and electric current.
• For 5: Transition metals are characterized by the presence of electrons in the d orbital.
• For 6: Atomic radius is one - half the distance between the nuclei of two atoms when the atoms are joined.
• For 7: Electrons are subatomic particles that are transferred to form positive and negative ions.
• For 8: Electronegativity is the ability of an atom to attract electrons when the atom is in a compound.
• For 9: Ionization energy is the energy required to remove an electron from an atom.

Answer:

1. c. period
2. i. group
3. h. periodic law
4. d. metal
5. f. transition metal
6. a. atomic radius
7. b. electrons
8. g. electronegativity
9. e. ionization energy