Question

question 3 (9 points)
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. period
b. metal
c. transition metal
d. electrons
e. atomic radius
f. electronegativity
g. periodic law
h. group
i. ionization energy
question 4 (1 point)
in the bohr model of the atom, an electron in an orbit has a fixed —
o a size
o b color
o c position
o d energy

Explanation:

Question 3

• 1. horizontal row in the periodic table: In the periodic table, horizontal rows are called periods.
• 2. vertical column in the periodic table: Vertical columns in the periodic table are known as groups.
• 3. A repetition of properties occurs when elements are arranged in order of increasing atomic number: This is the periodic law.
• 4. type of element that is a good conductor of heat and electric current: Metals are good conductors of heat and electricity.
• 5. type of element characterized by the presence of electrons in the d orbital: Transition metals have electrons in the d - orbital.
• 6. one - half the distance between the nuclei of two atoms when the atoms are joined: This is the definition of atomic radius.
• 7. subatomic particles that are transferred to form positive and negative ions: Electrons are transferred to form ions.
• 8. ability of an atom to attract electrons when the atom is in a compound: Electronegativity is the ability of an atom to attract electrons in a compound.
• 9. energy required to remove an electron from an atom: Ionization energy is the energy needed to remove an electron from an atom.

In the Bohr model of the atom, electrons are in fixed energy levels or orbits. The size of the orbit is related to the energy of the electron, but the key characteristic emphasized in the Bohr model for an electron in an orbit is its fixed energy. Electrons do not have a fixed color (as it is a sub - atomic particle and color is a macroscopic property related to visible light interaction with matter in a different context). Also, in the Bohr model, although the position is somewhat defined within the orbit, the more fundamental and emphasized property is the fixed energy.

Answer:

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

Question 4