Coach Book Chapter 1 Review

Front

Which of these BEST describes the motion of atoms in solid iron as it melts?

Back

The atoms speed up and move past one another.

Front

The diagram is a representation of the periodic table. The letters A through D represent four elements. Which letter represents the element with the MOST protons? (lesson 2)

Back

D

Front

Sulfur, bromine, and argon are nonmetal elements. At room temperature, sulfur is a solid, bromine is a liquid, and argon is a gas. Which statement about these elements is true?

Back

Sulfur has a higher melting point than either bromine or argon

Front

A scientist mixes 78 grams of potassium with 71 grams of chlorine gas. How much potassium chloride can be produced?

Back

149 grams

Front

Which of these represents an element?
Options: Pb, PbS, CO₂, NaCl

Back

Pb

Front

What is the BEST evidence that a substance has undergone a chemical change?

Back

The substance has released light.

Front

A student pours a teaspoon of salt into a glass of water and stirs until the salt dissolves completely. What kind of substance has the student made?

Back

a homogeneous mixture

Front

Chemical equation: Ni₂O₃ → Ni + O₂. How many total atoms of nickel are involved?

Back

4

Front

At which temperature does nitrogen MOST LIKELY condense, or change from a gas to a liquid?
Options: -14°C, -196°C, -210°C, -406°C

Back

-196°C

Front

Which situation involves a precipitate forming?

Back

Two liquid solutions are mixed together, and a yellow solid forms at the bottom of the container.