WorksheetsHW 7-1 Isotopes
Total questions: 18
Worksheet time: 16mins
In isotopic notation what would be located in the "A" position?
number of neutrons
atomic number
number of electrons
mass number
If X is the symbol for an element, which of the following two symbols represent isotopes of the same element?
I. 7735X II. 7733X III. 8137X IV. 8135 X
I and II
III and IV
I and IV
I and III
Four isotopes of lead include lead-204, lead-206, lead-207, and lead-208. The average atomic mass of lead is 207.2. Which isotope of lead is likely to be the most abundant?
204
206
207
208
What is the name of the pictured isotope?
Copper-29
Copper-63
Copper-34
Copper- 92
The atomic mass on the periodic table of an element depends upon the ___.
relative abundance of protons in that element
mass and relative abundance of each isotope of that element
mass of each isotope of that element
mass of each electron in that element
Which of the following is necessary to calculate the atomic mass of an element?
the atomic mass of carbon-12
the atomic number of the element
the relative masses of the element's protons and neutrons
the masses of each isotope of the element
Magnesium exists as the three isotopes shown. What is the average atomic mass of magnesium?
20.74 amu
22.56 amu
18.39 amu
24.31
How many neutrons does an atom of the isotope Neon-22 have?
12
10
22
20
4 isotopes of an element exist. 24.1% have a mass of 75.23 amu, 48.7% have a mass of 74.61 amu, and 27.2% have a mass of 75.20 amu.
What is the average mass of this element?
74.92 amu
24.97 amu
75.01 amu
74.51 amu
The isotopes of an element are listed below
4.35% have a mass of 49.9461 amu,
83.79% have a mass of 51.9405 amu,
9.50% have a mass of 52.9407 amu,
2.36% have a mass of 53.9389 a.m.u.
Determine the atomic mass of the element.
51.99 amu
52.19 amu
53.45 amu
17.33 amu
Calculate the average atomic mass of silver.
106.38649 amu
111.91896 amu
107.8677amu
121.0000 amu
