WorksheetsAtomic Theory Test
Total questions: 25
Worksheet time: 24mins
Which description about the proton is NOT True?
A subatomic particle that lives in the nucleus
Changing the protons changes the identity of an element
It is the same as the mass number
Which statement is true about the MASS of subatomic particles?
1 neutron + 1 electron = -1
1 proton + 1 electron = 0
1 proton = 1 electron
4 protons = 4 neutrons
Which of the following is NOT an accurate description of the nucleus?
The number of protons is always the same as what?
atomic mass
number of neutrons
number of electrons
What is the atomic symbol for an atom with 31 protons and 38 neutrons?
Sr
Tm
N
Ga
How many protons are in Xenon
54
77
131
185
Match the following with the correct number of protons.
P
15
Zn
30
K
19
F
9
Be
4
An atom with 23 protons, and 20 electrons and a mass of 51 has how many neutrons?
23
43
28
51
What is the mass number for this Copper atom?
94
65
36
29
Fluorine-9-1
Fluorine-10-1
Fluorine-19-1
Fluorine-28-1
atoms
atomic pair
ions
What is the name of the isotope that has an atomic number of 34, an atomic mass of 74 and a charge of -2?
Selenium-74-2
Zirconium-74-2
Selenium-34-2
Hassium-108-2
Which isotope will have 28 protons, 28 electrons and 30 neutrons?
Nickel-58
Nickel-58+2
Nickel-58-2
Nickel-56+2
Which of the following is a cation?
An atom with 12 protons and 10 electrons
An atom with 10 protons and 12 electrons
An atom with 8 protons and 8 electrons
An atom with 7 protons and 10 electrons
An atom becomes _________ when it _______ electrons.
positive, gains
negative, loses
Neutral, gains
positive, loses
Which description about the electron is NOT True?
Negatively charged particle with a mass of 0 amu
A subatomic particle located in the outer cloud
Negatively charged particle in the nucleus
A subatomic particle that can change the charge of an atom
What ion has 35 protons and 36 electrons and 45 neutrons?
Br+1
Br-1
Rh+1
Rh-1
What ion has 11 protons, 12 neutrons, and 10 electrons?
Na+1
Mg+1
Na-1
Mg-1
Which of the following is an NOT an Anion?
an ion with 18 protons and 16 electrons
an ion with 8 protons and 9 electrons
an ion with 29 protons and 30 electrons
an ion with 8 protons and 10 electrons
Which of the following ions have the same number of electrons?
O-2 and S-2
K and K+1
Zn+1 and Cu+2
Ne and N-3
The atomic masses and natural abundances of the isotopes of Iron are given in the chart. Which numerical setup can be used to determine the average atomic mass of iron?
(53.9396 x 8.07) + (55.9349 x 90.17) + (56.9354 x 1.76)
(56.9354 x 1.76) - (53.9396 x 8.07) + (55.9349 x 90.17)
(0.539396 x .807) + (0.559349 x .9017) + (0.569354 x .176)
(53.9396 x 0.0807) + (55.9349 x 0.9017) + (56.9354 x 0.0176)
Element Z has 2 natural isotopes. One isotope has a mass of 15.0 amu and a relative abundance of 30%. The other isotope has a mass of 16.0 amu and a relative abundance of 70%. Estimate the average atomic mass for this one element.
15.0 amu
16.0 amu
15.7 amu
16.9 amu
Which of these atoms are isotopes?
atoms 1 & 3
atoms 1 & 4
atoms 2 & 3
atoms 2 & 4
Which of these atoms have the same mass number?
atoms 1 & 2
atoms 1 & 4
atoms 2 & 3
atoms 2 & 4
A neutral atom of fluorine loses 2 e- what is its charge?
+2
-2
charge does not change
it becomes Nitrogen
