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