Atoms STAAR Test

An element has a metallic-gray appearance. It also has the properties of both a metal and a nonmetal. In which section of the periodic table indicated would the element most likely be found? (8.5C)

• 1

• 2

• 3

• 4

All of the following elements are metals except -- (8.5C)

• xenon

• lithium

• radium

• magnesium

An atom of an element contains 20 protons. What is the identity of the element? (8.5B)

• Argon

• Calcium

• Neon

• Potassium

Elements are arranged in the Periodic Table based on their properties in a particular order. Which of the following correctly identifies the period and group of the elements listed? (8.5C)

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• 
• 

Which of the following tables would be used to correctly describe the difference between metals and non-metals? (6.6A)

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• 
• 
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If an element is shiny, can be hammered into thin sheets, and is a good conductor of electricity, what type of element is it? (6.6A)

• a metal

• a metalloid

• a non-metal

• a gas

Which of the following elements is MOST reactive? (6.6A)

• Fr

• Ca

• O

• Ba

Which statement accurately describes the atoms of a specific element?-- 8.5C

• An indium‚ In‚ atom contains 115 protons inside the nucleus and 49 neutrons outside the nucleus.

• A scandium‚ Sc‚ atom contains 45 electrons outside the nucleus and 21 neutrons inside the nucleus.

• An aluminum‚ Al‚ atom contains 27 electrons and 27 protons inside the nucleus.

• A zinc‚ Zn‚ atom contains 30 protons inside the nucleus and 30 electrons outside the nucleus.

Tags

NGSS.MS-PS1-1

How many valence electrons are in an atom of each element in Group 15 in the periodic table? --8.5C

• 1

• 15

• 5

• 4

A scientist performs tests on a sample of an element. The element is a shiny solid that conducts electricity and heat. The scientist is able to bend and flatten the sample when pressure is applied to it.

Based on this information, the element could NOT be a member of which group on the periodic table?

• Group 2

• Group 8

• Group 12

• Group 18