Science STARR Review

In the diagram, the arrows labeled III point to the atom's ______________.

• Protons

• Neutrons

• Nucleus

• Electrons

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NGSS.MS-PS1-1

Elements with seven valence electrons —

• are highly reactive

• are highly stable

• have a high mass

• have a low mass

Which of these elements would have properties most similar to arsenic (As)? Use the periodic table and your notes slides.

• Silicon (Si)

• Selenium (Se)

• Tin (Sn)

• Phosphorus (P)

Sulfur is a nonmetal. Of the following, the physical characteristic that is most

likely to describe a sample of sulfur is —

• a shiny appearance

• brittleness

• malleability

• ductility

Potassium nitrate is a compound used in some fertilizers. Its chemical formula

is KNO3. How many TOTAL atoms are in each unit of potassium nitrate?

• 2

• 5

• 3

• 9

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NGSS.MS-PS1-1

A student uses a magnet to move a .04 kg ball bearing. The magnet exerts a force of 4N, which causes the ball bearing to begin moving. What is the acceleration of the ball bearing when it begins to move?

• .01 m/s2

• .16 m/s2

• 3.96 m/s2

• 100 m/s2

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NGSS.MS-PS2-2

While practicing in a simulator, an astronaut experienced an acceleration of 26 m/s2. The astronaut's mass was 63.0 kg. In Newtons, what force did the astronaut experience?

• 2.42 N

• 37 N

• 1638 N

• 42,588 N

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NGSS.MS-PS2-2

In this model, which particle determines the reactivity of this atom?

• Particle W

• Particle X

• Particle Y

• Particle Z

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NGSS.MS-PS1-1

An atom of which element is represented by this model?

• Boron (B)

• Carbon (C)

• Neon (Ne)

• Sodium (Na)

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NGSS.MS-PS1-1

(8.5C) A student is studying the ways different elements are similar to one another. Diagrams of atoms from four different elements are shown below.
Which two atoms are of elements in the same group in the periodic table?

• Atom 1 and Atom 2

• Atom 1 and Atom 4

• Atom 2 and Atom 3

• Atom 3 and Atom 4

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NGSS.MS-PS1-1