a chemical element, that has the same # of protons in its nucleus (same atomic number), but has different #'s of neutrons in its nucleus (different atomic weights)
100
The majority of elements in the periodic table are:
A) Metals
B) Nonmetals
C) Metalloids
D) Noble Gases
A) Metals
100
The subatomic particles most involved in the formation of a chemical bond are
A) protons
B) electrons
C) quarks
D) neutrons
b) electrons
100
What is a polar covalent bond?
a type of covalent bond between two atoms in which electrons are shared unequally
Ex. water
100
When a lithium atom forms an Li+ ion, the lithium atom
a) gains a proton
b) gains an electron
c) loses a proton
d) loses an electron
Which of the following determines the order of the elements on the Periodic Table?
A) mass number
B) number of neutrons
C) number of nucleons
D) number of electrons
E) number of protons
E) number of protons
200
A calcium ion differs from a calcium atom because the calcium ion has
a) more protons than the atoms
b) more electrons than the atom
c) more neutrons than the atom
d) less protons than the atom
e) less electrons than the atom
e) less electrons than the atom
200
What is a nonpolar covalent bond?
A covalent bond where the electrons are shared equally between two atoms.
Examples: H-H or Cl-Cl
200
Carbon is found in the _____ period and the _____ family/group on the periodic table.
a) 2nd, 14th
b) 3rd, 13th
c) 4th, 2nd
d) 13th, 3rd
e) 14th, 2nd
a) 2nd, 14th
periods = go across
families = up & down
300
If I two isotopes called C-12 and C-14, what is different in each of them?
a) number of protons
b) number of electrons
c) number of neutrons
d) number of valence electrons
c) number of neutrons
300
For elements listed in the same columns of the Periodic chart, which property increases moving from top to bottom?
A) Concentration
B) Half-life
C) Hardness
D) Atomic Weight
D) Atomic Weight
300
How many neutrons are most likely found in fluorine? (use Periodic Table)
a) 1
b) 9
c) 10
d) 19
e) 28
c) 10
300
The bond between 2 sulfur atoms (S-S) is
a) ionic
B) metallic
C) dipole
D) nonpolar covalent
E) polar covalent
D) nonpolar covalent
***(equal sharing of electrons between 2 atoms) in a covalent bond
300
Which statement about the mass of an electron is correct?
A) The mass of an electron is greater than the mass of a neutron
B) The mass of an electron is equal to the mass of a neutron
C) The mass of an electron is less than the mass of a proton
D)The mass of an electron is equal to the mass of a neutron
C) The mass of an electron is less than the mass of a proton
400
What characteristic is different in each isotope?
a) the net charge of the nucleus
b) the mass of the protons in the nucleus
c) the number of neutrons in the nucleus
c) the position in the periodic table of the elements
400
The least reactive group of elements on the Periodic Table are the
A) alkalines
B) transition elements
C) noble gases
D) halogens
E) Group 5 elements
C) noble gases
400
How many electrons are found in the outer most shell of Calcium?
a) 1
b) 2
c) 5
d) 7
e) 8
b) 2
400
Which of the elements forms an ionic bond with Lithium?
a) argon
b) calcium
c) fluorine
d) neon
3) potassium
c) fluorine
***Recall, that an ionic bond forms between a metal and a non-metal. > Lithium = metal & Fluorine = nonmetal
400
Which element gives up an electron when forming an ionic bond?
a) element with 10 electrons
b) element with 11 electrons
c) element with 12 electrons
d) element with 17 electrons
b) element with 11 electrons
500
The isotope Copper-65 has ---
a) 1 more proton than Copper-64
b) 1 more neutron than Copper-64
c) 1 more electron than Copper-64
d) a 1+ charge compared to Copper-64
e) a 1- charge compared to Copper 64
b) 1 more neutron than Copper-64
500
This element has about twice the atomic mass of lithium (use the periodic table):
A) Boron (B)
B) Carbon (C)
C) Nitrogen (N)
D) Oxygen (O)
C) Nitrogen (N)
500
The chloride ion typically has a negative charge.
Which of the following explains why the chloride ion has a negative charge?
A) It has more electrons than protons.
B) It has more neutrons than protons.
C) It has more protons than neutrons.
D) It has more electrons than neutrons.
A) It has more electrons than protons.
500
How many electrons are in the outermost principal energy level of an atom of carbon in the ground state?
a) 2
b) 3
c) 4
d) 6
c) 4
500
What is the difference between atomic number and atomic weight?
atomic number: no. of protons
atomic weight: no. of protons + neutrons
atomic # = also determines which element an atom is
atomic weight = average mass of an element