Worksheetsatomic structure
Total questions: 20
Worksheet time: 10mins
What is a subatomic particle with a positive charge that is in the nucleus of an atom?
neutron
proton
electron
valence electron
What is a subatomic particle without an electric charge, located in the nucleus of an atom?
neutron
proton
electron
valence electron
What is the system of electrons surrounding the nucleus of an atom?
valence electrons
nucleus
electrons
electron cloud
What is the center of an atom containing protons and neutrons?
nucleus
neutron
proton
electron cloud
What is the number of protons in the nucleus of an atom that determines the chemical properties of an atom?
mass number
atomic mass
atomic number
atomic symbol
What is the combined mass of all the protons and neutrons of an atom and is approximately equal to the number of protons and neutrons?
atomic mass
atomic number
subatomic particles
nucleus weight
How many protons does an aluminum atom have?
27
14
40
13
How many electrons does a sodium atom have?
23
11
12
34
The mass number of an element that has 18 protons, 18 electrons, and 19 neutrons is _____.
12.5
13
25
37
What element has 9 protons, 9 electrons, and 10 neutrons?
nitrogen
oxygen
fluorine
neon
What is the correct number of subatomic particles of a phosphorous atom with a mass of 31?
p# - 15, n# = 15, e# = 15
p# - 15, n# = 16, e# = 15
p# - 15, n# = 15, e# = 16
p# - 16, n# = 15, e# = 15
What is the atomic number of a chlorine atom with a mass of 35 amu?
17
35
18
52
Is the number below the element symbol on the periodic table the mass number?
Yes!
NO!!
