PS 1.1-1.3 EOG Review

Javier's teacher gives him four cards, each displaying information about an element, and asks him to put them in order of reactivity. The elements are carbon (C), helium (He), magnesium (Mg), and potassium (K). Javier arranges the elements in order from most reactive to least reactive, as shown in the diagram: Is Javier's arrangement correct? Why or why not?

• Yes, because the reactivity of elements decreases as their atomic numbers decrease.

• Yes, because the reactivity of elements decreases from left to right on the periodic table.

• No, because the reactivity of elements decreases from right to left on the periodic table.

• No, because the reactivity of elements decreases as their atomic masses increase.

The chart shows the composition of an unknown atom. Number of Protons: 15 Number of Neutrons: 16 Number of Electrons: 15 Which atom is described in the chart?

• sulfur

• silicon

• nitrogen

• phosphorous

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NGSS.MS-PS1-1

How many elements are on the periodic table?

• 56

• 93

• 118

• 154

On the periodic table, atomic mass

• increases up a group.

• decreases down a group.

• decreases across a period from left to right.

• increases across a period from left to right.

The periodic table is organized into vertical groups of

• elements with similar properties.

• compounds with different properties.

• elements with all the same chemical properties.

• compounds with all different physical properties.

Aspirin, or acetylsalicylic acid, has the following chemical formula: C9H8O4 One aspirin molecule contains

• carbon, helium, and oxygen.

• calcium, hydrogen, and osmium.

• carbon, hydrogen, and oxygen.

• calcium, helium, and osmium.

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NGSS.MS-PS1-1

Which is the smallest unit of an element?

• an atom

• a proton

• a neutron

• an electron

This is the periodic table of the elements. The diagram shows an unknown atom. Based on the information from the periodic table, which atom is shown in the diagram?

• boron

• carbon

• nitrogen

• beryllium

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NGSS.MS-PS1-1

Based on the information from the periodic table, which mistake did Darnell make on his diagram?

• Nitrogen should have eight protons instead of six.

• Nitrogen should have seven protons instead of six.

• Nitrogen should have six electrons instead of seven.

• Nitrogen should have eight electrons instead of seven.

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NGSS.MS-PS1-1

Gold is an element. What does an element of gold contain?

• one kind of compound

• a single type of atom

• a simple mixture of different atoms

• one mixed substance of two different metals