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Science-Ch.6
Test Description: Atomic Structure and Chemical Bonds need to know ph of bases, acids, and neutral samples, and the formula for density on own
Instructions: Answer all questions to get your test result.
1) What is the name given to the units that make up covalently bonded compounds?
A
electrons
B
ions
C
energy levels
D
molecules
2) Dot diagrams are used to represent
A
atomic mass
B
outer electrons
C
the structure of the nucleus
D
protons
3) In carbon dioxide, each oxygen atom shares four electrons with the carbon atom. What is this type of bond called?
A
ionic
B
polar covalent
C
double covalent
D
triple covalent
4) One of the chemical properties of bases is that they _____________.
A
corrode metal
B
feel slippery
C
crumble
D
taste sour
5) All of the following are examples of chemical weathering except ____________________.
A
acid rain
B
pollution
C
rocks breaking because of ice
D
cave formations
6) Which of the following statements about the atom is false?
A
Electrons travel in definite circular pathways around the nucleus.
B
All atomic nuclei are positively charged.
C
Each atom has a tiny nucleus at its center.
D
All the protons and neutrons are located in the nucleus.
7) What is the neutral particle that is formed when atoms share electrons?
A
ionic compound
B
molecule
C
nucleus
D
caution
8) All of the following are a state of matter EXCEPT _______________.
A
liquid
B
density
C
solid
D
gas
9) Which of the following is an example of a physical change?
A
electricity produced by a dry cell
B
rusting of a car body
C
digestion of a hamburger
D
evaporation in a swamp cooler
10) A charcteristic of matter that allows it to change to something new is a _____________.
A
chemical change
B
physical property
C
physical change
D
chemical property
11) The particles that make up an atom are _______________.
A
elements, protons, and electrons
B
protons, neutrons, and nuclei)
C
electrons, protons, and nuclei
D
protons, neutrons, and electrons
12) In the compound H2O2, the electrons in the bonds are unequally shared between oxygen and hydrogen, forming ______________.
A
cations
B
nonpolar molecules
C
polar bonds
D
ionic bonds
13) Which of the following is an example of a chemical change?
A
bending steel
B
freezing water
C
baking soda in water
D
painting a house
14) The following are examples of chemical properties except _________________.
A
the ability to be crushed
B
the ability to react with oxygen
C
toxicity
D
the ability to burn
15) The maximum number of electrons in the second energy level of an atom is ___________________.
A
ten
B
eight
C
two
D
four
16) Which of the following bonds is polar?
A
H-H
B
O-H
C
O-O
D
F-F
17) How many dots are shown in the electron dot diagram for calcium, element number 20?
A
twenty
B
two
C
one
D
eight
18) All of the following are examples of physical changes except ______________________.
A
melting
B
solidifying
C
burning
D
evaporating
19) The energy levels of an atom are occupied by _____________.
A
ions
B
protons
C
electrons
D
neutrons
20) Density is an example of a ______________________.
A
physical property
B
physical change
C
chemical change
D
chemical property
*select an answer for all questions
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