Question 1

At standard room temperature (25 $$^\circC) $$and pressure (1 atm), which of the following elements exists as a diatomic gas and assumes both the shape and volume of its container?

Accepted Answer

Oxygen

Question 2

Which of the following best describes the physical state and properties of sodium (Na) at room temperature and 1 atm?

Accepted Answer

Solid; maintains a fixed shape and volume

Question 3

Which element is a representative element in the 2nd period that is not diatomic and is a solid at room temperature?

Accepted Answer

Beryllium

Question 4

Which of the following elements is a noble gas and exists as a monoatomic gas at room temperature?

Accepted Answer

Argon

Question 5

A sample of chlorine is released into a container at room temperature. Which statement best describes its behavior?

Accepted Answer

It will spread to fill the entire container and exist as Cl$$_2$$ molecules.

Question 6

Which of the following elements is a solid at room temperature and is commonly used in pencils?

Accepted Answer

Carbon

Question 7

Which of the following elements is a halogen that exists as a diatomic molecule and is a gas at room temperature?

Accepted Answer

Fluorine

Question 8

Which of the following elements is most likely to be found as a liquid at room temperature?

Accepted Answer

Bromine

Question 9

Which of the following elements is a metalloid and is a solid at room temperature?

Accepted Answer

Silicon

Question 10

Which of the following elements is a representative element, is not diatomic, and is a solid at room temperature?

Accepted Answer

Boron

Question 11

Which of the following elements is a noble gas and does not form diatomic molecules?

Accepted Answer

Neon

Question 12

Which of the following elements is a halogen that exists as a solid at room temperature?

Accepted Answer

Iodine

Question 13

Which of the following elements is a nonmetal, exists as a diatomic molecule, and is essential for respiration in humans?

Accepted Answer

Oxygen

Question 14

Which of the following elements is a solid at room temperature and is used in the manufacture of computer chips?

Accepted Answer

Silicon

Question 15

Which of the following elements is a gas at room temperature and is used in advertising signs due to its bright glow?

Accepted Answer

Neon

Phases of Elements and the Periodic Table: States of Matter and Elemental Forms

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