BMS Science 8th grade Unit 1 review

the table provides info on 4 different elements.

which element has six protons in its nucleus?

• Boron

• Carbon

• Nitrogen

• Oxygen

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NGSS.MS-PS1-1

look at the graphic and answer the question

• different isotopes

• oxidation states

• electron energy levels

• protons in its nucleus

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NGSS.MS-PS1-1

the number of valence electrons in an atom determines its

• atomic number

• chemical reactivity

• number of protons

• atomic mass

which of the following trends can be observed when moving down a column in the periodic table?

• the atomic mass increases

• the number of valence electrons increases

• the number of electron energy levels decreases

• the possible number of bonds formed increases

when moving across a row in the periodic table from left to right, which of the following trends appears?

• the atomic mass of the element increases

• the metallic property of the elements increases

• the number of valence electrons decreases

• the atomic number and density decrease

Which of the following sequences of elements would have 4 valence electrons?

• B, Si, As, Te

• C, Si, Ge, Sn

• O, S, Se, Te

• Ga, Ge, As, Se

In which location of the Periodic Table are the metalloids found?

• A

• B

• C

• D

Which pair of elements has the same number of valence electrons?

• Boron and Carbon

• Carbon and Aluminum

• Boron and Aluminum

• Aluminum and Silicon

Which pair of elements would have the same number of valence electrons?

• Lithium and Beryllium

• Magnesium and Sodium

• Lithium and Sodium

• Magnesium and Lithium

Tags

NGSS.MS-PS1-1

Which element would have similar properties to sulfur?

• Nitrogen

• Oxygen

• Fluorine

• Chlorine