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WorksheetsAtomic Structure Atomic Models and Isotopes
Total questions: 24
Worksheet time: 22mins
A proton has a...charge.
(a)
An electron has a...charge.
(a)
Which of the following atomic particles is in the nucleus? Select all that apply.
Protons
Neutrons
Electrons
Electron Cloud
Protons and neutrons have...while electrons have almost none. This is why the nucleus is so dense.
(a)
Thanks to the gold foil experiment, we know most of the atom is (a) space, outside of the dense and small nucleus.
Which element has an atomic number of 3? You may look at your periodic table for this.
Hydrogen
Helium
Lithium
Carbon
If an element has an atomic number of 3, how many protons does it have?
(a)
If an atom is NEUTRAL (has no charge) and has 3 protons, how many electrons does it have?
(a)
If an element has an atomic number of 3 and an atomic mass of 7, how many NEUTRONS does it have? (Hint: what makes up the mass of an atom?)
4
5
6
7
If an element has an atomic number of 5 and you add one proton, what element is it now? Hint: Adding a proton changes the atomic number!
(a)
If an element has 5 protons and 6 neutrons, what is its atomic mass?
(a)
What is the difference between atomic mass and atomic number?
Atomic mass is equal to electrons
There is no difference
Atomic mass is equal to protons + neutrons
Atomic number is equal to protons + neutrons
An element has 8 protons and 8 neutrons. What element is this?
(a)
An element has 14 neutrons and an atomic mass of 27. What element is this? Hint: calculate the number of protons.
(a)
Isotopes are different from each other based on the number of...
(a)
Which extensive property is different between isotopes?
Mass
Color
Melting point
Conductivity
You find a rare isotope of neon called Neon-23. The atomic number of neon is 10. How many neutrons does it have?
(a)
Nitrogen has two main isotopes. Nitrogen-14 has a percent abundance of 60% and Nitrogen-16 has a percent abundance of 40%. What is the average atomic mass?
16 amu
14 amu
14.8 amu
15.2 amu
Helium-4 has a percent abundance of 20% and Helium-5 has a percent abundance of 80%. What is the average atomic mass?
4.4 amu
4.8 amu
5.2 amu
6 amu
Hydrogen-1 has a % abundance of 20%, Hydrogen-2 has a % abundance of 30%, and Hydrogen-3 has a % abundance of 50%. What is the average atomic mass?
2.1 amu
2.3 amu
2.5 amu
3 amu
During (a) decay, a nucleus ejects an alpha particle (helium nucleus).
During beta decay, a nucleus gives off an (a) .
High energy rays known as (a) rays often occur after alpha or beta decay.
During nuclear fission or fusion, a (a) can be ejected from a nucleus, turning the atom into a different isotope.
