Download Name: _______Date:_______________Per:____ Sodium, chlorine

Name:_____________________________________________________Date:___________________Per:____
1st 6 week Exam
1. Sodium, chlorine, and aluminum are all alike because they all three____
a. are compounds
b. are nonmetals
c. have one valence electron
d. have 3 energy levels
2. Which of the following has properties most similar to oxygen?
a. nitrogen
b. potassium
c. sulfur
d. neon
3. A boron model is made of____
a. 5 protons, 5 neutrons, and 5 electrons
b. 5 protons, 6 neutrons, and 11 electrons
c. 5 protons, 6 neutrons, and 5 electrons
d. 5 protons, 6 neutrons, and 6 electrons
4. Which of these statements is true about an atom of chromium?
a. It has more protons than electrons.
b. It has an atomic number of 51.996.
c. It has fewer parts than an atom of Iron.
d. It has more electrons than neutrons.
5. All elements in the same period have the same number of _______.
a. Protons
b. valence electrons
c. energy levels
d. neutrons
6. Which element is the only element in the 3rd period that has 8 electrons in its outermost energy
level?
a. Neon
b. Argon
c. Cobalt
d. Helium
7. The below model best represents a _____
a. helium atom
b. carbon atom
c. helium ion
d. hydrogen atom
8. What does the atomic mass tell you about an atom?
a. the mass of its protons, electrons, and neutrons
b. the mass of its protons and electrons
c. the mass of its protons
d. the mass of its protons and neutrons
9. How many total atoms are in the following chemical formula? 2 CuSO4
a. 10 atoms
b. 2 atoms
c. 12 atoms
d. 8 atoms
10. Electron shells that are_____ tend to not react with other elements or chemicals.
a. empty
b. not full
c. full
d. unstable
11. It is impossible to determine the exact location of electrons in the atom at any moment.
a. True
b. False
12. Which of these best describes one of the subatomic particles that could be found in the nucleus
of an atom?
a. it has mass but no charge
b. it has no mass and a positive charge
c. it has a large mass and a negative charge
d. it has a small mass and a negative charge
13. The periodic table organizes elements into vertical columns also called ______.
a. periods
b. energy levels
c. rows
d. groups
14. If an element has 11 protons and 12 neutrons, what is the atomic mass of the element?
a. 23
b. 11
c. 12
d. 22
15. Even though we use the Bohr model, we know that electrons are really —
a. in orbits like the planets around the sun
b. in a series of energy levels outside of the nucleus called the electron cloud
c. inside of the nucleus
d. attached to the protons
16. Atoms bond with other atoms based on their valence electrons, how many more valence
electrons does Aluminum need to be stable (have a full outer shell)?
a. 8 electrons
b. 1 electron
c. 2 electrons
d. 5 electrons
17. Which element would react with the element shown below?
a. fluorine
b. neon
c. sodium
d. helium
18. Chlorine and bromine have the same number of__
a. electron orbitals (energy levels)
b. valence electrons
c. protons
d. neutrons
19. In the chemical formula H2SO4, what does the subscript 4 represent?
a. atoms
b. compounds
c. neutrons
d. electrons
20. In the formula Ca(OH)2, how many oxygen atoms are present?
a. 1 atoms
b. 2 atoms
c. 4 atoms
d. 8 atoms
21. An atom has a neutral charge. Which of the following must be true about the atom? It has__
a. more neutrons than protons
b. more neutrons than electrons
c. the same number of electrons and protons
d. none of the above
22. Which element has the same number of electrons in the outermost energy level as Calcium?
a. Lithium
b. Magnesium
c. Hydrogen
d. Boron
23. How many electrons can the 2nd energy level hold?
a. 8
b. 2
c. 16
d. 1
24. A pure substance made of 1 type of atom is a(n) _
a. molecule
b. compound
c. chemical formula
d. element
25. What element is found in Period 2 and Group 3?
a. Beryllium
b. Neon
c. Boron
d. Magnesium
26. All of these are examples of 1 element except for___
a. Ne
b. Cu
c. CO
d. K
27. The _______________ determine the identity of an element.
a. electrons
b. neutrons
c. protons
d. quarks
28. An atom’s volume is mostly the empty space of the electron cloud.
a. True
b. False
29. The 2 subatomic particles that make up the mass of an atom are the ____
a. protons and electrons
b. protons and neutrons
c. electrons and neutrons
30. Which element listed in the table above has an atomic number of 79?
a. cesium
b. selenium
c. gold
d. radium