A student makes a drawing of a carbon atom. Which of these should the student show in the nucleus of the atom? *
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Ions
Protons
Electrons
Molecules
2. Which pair below describes isotopes of the same element? *
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A) an atom with 6 protons and 8 neutrons - an atom with 8 protons and 6 neutrons
B) an atom with 6 protons and 6 neutrons - an atom with 6 protons and 7 neutrons
C) an atom with 8 protons and 8 neutrons - an atom with 7 protons and 8 neutrons
D) an atom with 7 protons and 6 neutrons - an atom with 6 protons and 6 neutrons
3. Which diagram best represents molecules of matter in the gas phase? *
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A

B

C

D
4. All of the liquid from a test tube is poured into a beaker, as shown in the diagram below. Compared to the liquid that was in the test tube, the liquid in the beaker has *
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A. a different volume, but the same shape.
B. the same volume, but a different shape.
C. a different volume and a different shape.
D. the same volume and the same shape.
5. Color, shape, texture, and size are _____________ properties of matter. *
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A) Chemical
B) liquid
C) physical
D) solid
6. Maggie recorded her observations of the baking soda used in lab today. Which observation indicated a chemical property of the baking soda? *
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A) Odor
B) Color
C) Texture
D) Bubbles
7. The pictures below represent changes observed: *
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A) Picture I shows a chemical change, because a new substance is formed.
B) Picture II shows a chemical change, because a new substance is formed.
C) Picture I shows a chemical change, because the same substance changes form.
D) Picture II shows a chemical change, because the same substance changes form.
8. The diagram below shows a portion of the Periodic Table of the Elements. Which element below has chemical properties similar to the chemical properties of fluorine (F)? *
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B
O
He
I
9. Which element below has chemical properties similar to the chemical properties of tin (Sn)? *
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As
In
Ge
Sb
10. Which of the following statements best explains why elements in the same family of the periodic table have similar bonding properties? *
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A) The elements have similar atomic sizes.
B) The elements have similar atomic masses.
C) The elements have similar numbers of protons.
D) The elements have the same number of valence electrons.