Parts of an Atom
1. What are the 3 subatomic particles (parts) that make up an atom?
6. What is the mass number for this element: Na
22.99 or 23
11. What is the measurement of the size of an atom?
atomic radii
16. Which periodic trend do we use when comparing the sizes of atoms?
atomic radii
21. True or False: Everything is made up of matter.
True
2. Which two particles are inside the nucleus?
protons and neutrons
7. What is the atomic number of Kr?
36
12. What is the energy required to remove an electron from an atom called?
ionization energy
17. Place the atoms in order of lowest ionization energy to highest ionization energy: V , Ra, F, Ga
Ra, V, Ga, F
22. What does the Law of Conservation of Mass state?
mass/matter cannot be created nor destroyed
3. What are the charges of each of the 3 particles in an atom? (positive, neutral, or negative)
neutrons = neutral
protons = positive
electrons = negative
8. Oxygen (O) and sulfur (S) are both in the same _________ (period/group).
group
13. What is the trend for atomic radii going down a group?
increases
18. Place the following atoms in order of smallest to largest size: Fe, Y, Zn, Ne
Ne, Zn, Fe, Y
23. Two or more elements combine to make a ____________.
4. What particles make up the mass number?
protons and neutrons
9. What information is given by the atomic number?
number of protons
14. What is the nuclear charge felt by the outer shell electrons called?
effective nuclear charge
19. What is the reason for the atomic radii trend going down a group?
24. The law of conservation of mass states that the mass in the reactants must be (greater than/equal to/less than) the mass in the products of a chemical equation.
equal to
5. What is the math function/equation that calculates the number of neutrons in an atom?
neutrons = mass number - protons
10. An element has 35 neutrons and a mass number of 63.546. What is this element?
copper (Cu)
15. Which trend does this arrow represent? (full answer needed)
atomic radii increasing
20. What is the reason for the ionization energy trend going down a group?
because the further away the outermost electron, the easier it is to remove (lower effective nuclear charge/less attraction)
25. Compounds are combined and separated based on _________ properties. (what kind of properties?)
chemical