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Questions and Answers

What is the definition of chemistry?

The study of the earth and its atmosphere.
The study of living organisms and their interactions.
The study of matter and its properties and how matter changes. (correct)
The study of energy and its transformations.

Which of the following is the simplest form of matter and cannot be broken down further by chemical means?

Molecule
Mixture
Compound
Element (correct)

What is the smallest unit of an element that retains the chemical properties of that element?

Compound
Mixture
Molecule
Atom (correct)

What is the definition of volume?

The amount of space that matter occupies. (B) Signup and view all the answers

Which of the following is an example of a homogeneous mixture?

Saltwater (B) Signup and view all the answers

Which of the following is an example of a physical property?

Color (A) Signup and view all the answers

What are the starting materials in a chemical reaction called?

Reactants (D) Signup and view all the answers

What does stoichiometry deal with?

Quantitative relationships between reactants and products in chemical reactions (D) Signup and view all the answers

What determines the maximum amount of product that can be formed in a chemical reaction?

Limiting reactant (D) Signup and view all the answers

What is the name for the ratio of actual yield to theoretical yield, expressed as a percentage?

Percent yield (D) Signup and view all the answers

Which particles are found in the nucleus of an atom?

Protons and neutrons (B) Signup and view all the answers

What is the charge of a proton?

Positive (D) Signup and view all the answers

What does the atomic number of an element represent?

Number of protons (D) Signup and view all the answers

What are atoms of the same element with different numbers of neutrons called?

Isotopes (B) Signup and view all the answers

What are positively charged ions called?

Cations (B) Signup and view all the answers

What name is given to the horizontal rows in the periodic table?

Periods (D) Signup and view all the answers

Elements in the same group have similar chemical properties because they have the same number of what?

Valence electrons (B) Signup and view all the answers

Which of these is a typical property of metals?

Good conductors of electricity (B) Signup and view all the answers

What type of bond involves the sharing of electrons between atoms?

Covalent bond (C) Signup and view all the answers

What determines a bond's polarity?

Electronegativity difference (B) Signup and view all the answers

In naming ionic compounds, which is named first?

Cation (D) Signup and view all the answers

What is the substance that dissolves in a solvent called?

Solute (A) Signup and view all the answers

What term describes substances that dissolve in water to produce ions and conduct electricity?

Electrolytes (C) Signup and view all the answers

Flashcards

Chemistry

The study of matter, its properties, and how it changes.

Matter

Anything that has mass and takes up space (volume).