LRA 211 WEEK1 CH. 2,3,&5 QUESTIONS
AND ANSWERS WITH COMPLETE
SOLUTIONS GUARANTEED SUCCESS!!!
1. Atomic number
Answer: ✔✔ The number of protons an atom contains in a nucleus.
Explanation:
The atomic number represents the number of protons in the nucleus of an
atom. This number is unique to each element and determines its identity. For
example, an atom with 1 proton is hydrogen, and an atom with 6 protons is
carbon.
2. Atomic mass
Answer: ✔✔ The number of protons and neutrons.
Explanation:
Atomic mass (also called mass number) is the sum of the protons and
neutrons in the nucleus of an atom. It gives the approximate mass of an
atom, typically measured in atomic mass units (AMU). For example, carbon-
12 has 6 protons and 6 neutrons, giving it an atomic mass of 12 AMU.
3. Isotopes
Answer: ✔✔ Same number of protons.
Explanation:
Isotopes are atoms of the same element that have the same number of
protons but a different number of neutrons. This difference in neutrons
results in different atomic masses. For example, carbon-12 and carbon-14
are isotopes of carbon, with both having 6 protons but differing in neutrons
(12 and 14, respectively).
4. Isotones
, Answer: ✔✔ Same number of neutrons.
Explanation:
Isotones are atoms that have the same number of neutrons but a different
number of protons. While isotopes are variations of the same element,
isotones come from different elements. For example, carbon-14 and
nitrogen-15 both have 8 neutrons but differ in their number of protons (6 for
carbon and 7 for nitrogen).
5. Ionic bond
Answer: ✔✔ Gives up 1 electron to bond together.
Explanation:
An ionic bond occurs when one atom donates an electron to another atom,
creating positive and negative ions. This transfer of electrons results in a
strong attraction between the oppositely charged ions, forming the bond. For
example, in sodium chloride (NaCl), sodium gives up one electron, and
chlorine accepts it, forming Na+ and Cl- ions that bond together.
6. Covalent bond
Answer: ✔✔ An outermost electron from one atom begins to orbit the
nucleus across from it creating a figure 8.
Explanation:
A covalent bond is formed when two atoms share electrons, typically from
their outermost shells (valence electrons). This shared electron pair allows
each atom to "fill" its valence shell, making both atoms more stable. The
description of the electron orbiting "across" creates a figure-eight pattern,
which is a simplified representation of how the shared electrons are
distributed between the two atoms.
7. Cathode
Answer: ✔✔ Creates free electrons through thermionic emission.
AND ANSWERS WITH COMPLETE
SOLUTIONS GUARANTEED SUCCESS!!!
1. Atomic number
Answer: ✔✔ The number of protons an atom contains in a nucleus.
Explanation:
The atomic number represents the number of protons in the nucleus of an
atom. This number is unique to each element and determines its identity. For
example, an atom with 1 proton is hydrogen, and an atom with 6 protons is
carbon.
2. Atomic mass
Answer: ✔✔ The number of protons and neutrons.
Explanation:
Atomic mass (also called mass number) is the sum of the protons and
neutrons in the nucleus of an atom. It gives the approximate mass of an
atom, typically measured in atomic mass units (AMU). For example, carbon-
12 has 6 protons and 6 neutrons, giving it an atomic mass of 12 AMU.
3. Isotopes
Answer: ✔✔ Same number of protons.
Explanation:
Isotopes are atoms of the same element that have the same number of
protons but a different number of neutrons. This difference in neutrons
results in different atomic masses. For example, carbon-12 and carbon-14
are isotopes of carbon, with both having 6 protons but differing in neutrons
(12 and 14, respectively).
4. Isotones
, Answer: ✔✔ Same number of neutrons.
Explanation:
Isotones are atoms that have the same number of neutrons but a different
number of protons. While isotopes are variations of the same element,
isotones come from different elements. For example, carbon-14 and
nitrogen-15 both have 8 neutrons but differ in their number of protons (6 for
carbon and 7 for nitrogen).
5. Ionic bond
Answer: ✔✔ Gives up 1 electron to bond together.
Explanation:
An ionic bond occurs when one atom donates an electron to another atom,
creating positive and negative ions. This transfer of electrons results in a
strong attraction between the oppositely charged ions, forming the bond. For
example, in sodium chloride (NaCl), sodium gives up one electron, and
chlorine accepts it, forming Na+ and Cl- ions that bond together.
6. Covalent bond
Answer: ✔✔ An outermost electron from one atom begins to orbit the
nucleus across from it creating a figure 8.
Explanation:
A covalent bond is formed when two atoms share electrons, typically from
their outermost shells (valence electrons). This shared electron pair allows
each atom to "fill" its valence shell, making both atoms more stable. The
description of the electron orbiting "across" creates a figure-eight pattern,
which is a simplified representation of how the shared electrons are
distributed between the two atoms.
7. Cathode
Answer: ✔✔ Creates free electrons through thermionic emission.
