Introduction to Chemistry

Podcast

Play an AI-generated podcast conversation about this lesson

Download our mobile app to listen on the go

Get App

Questions and Answers

What is the definition of chemistry?

The study of matter, its properties, and how it changes (correct)
The study of the Earth and its atmosphere
The study of living organisms
The study of energy and its various forms

Which of the following is a property of matter?

Density
Volume
Mass
All of the above (correct)

Which state of matter has a definite volume but no definite shape?

Gas
Plasma
Liquid (correct)
Solid

What is a substance that cannot be broken down into simpler substances by chemical means?

Element (A) Signup and view all the answers

What is a combination of two or more substances that are physically mixed but not chemically combined?

Mixture (B) Signup and view all the answers

Which type of mixture has a uniform composition throughout?

Homogeneous (C) Signup and view all the answers

What type of property can be observed without changing the substance's composition?

Physical property (A) Signup and view all the answers

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

Melting ice (C) Signup and view all the answers

What is the SI unit for mass?

Kilogram (kg) (D) Signup and view all the answers

What particles are located in the nucleus of an atom?

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

What does the atomic number (Z) of an element represent?

The number of protons in the nucleus (B) Signup and view all the answers

Elements in the same group (column) of the periodic table have similar:

Chemical properties (B) Signup and view all the answers

Which type of chemical bond involves the sharing of electrons between atoms?

Covalent bond (D) Signup and view all the answers

What is the term for the starting materials in a chemical reaction?

Reactants (D) Signup and view all the answers

What is the SI unit for the amount of substance?

Mole (mol) (B) Signup and view all the answers

What is the term for the reactant that is completely consumed in a chemical reaction?

Limiting reactant (C) Signup and view all the answers

Which gas law relates pressure and volume at constant temperature?

Boyle's law (A) Signup and view all the answers

What is a homogeneous mixture of two or more substances called?

Solution (A) Signup and view all the answers

Acids have a pH that is:

Less than 7 (C) Signup and view all the answers

Reactions that release heat are considered:

Exothermic (B) Signup and view all the answers

Flashcards

What is Chemistry?

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

What is Matter?

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