1.1 Chemistry in context Read Online
1.2 Phases and classification of matter Read Online
1.3 Physical and chemical properties Read Online
1.5 Measurement uncertainty, accuracy, and precision Read Online
1.6 Mathematical treatment of measurement results Read Online
Your alarm goes off and, after hitting “snooze” once or twice, you pry yourself out of bed. You make a cup of coffee to help you get going, and then you shower, get dressed, eat breakfast, and check your phone for messages. On your way to school, you stop to fill your car’s gas tank, almost making you late for the first day of chemistry class. As you find a seat in the classroom, you read the question projected on the screen: “Welcome to class! Why should we study chemistry?”
Do you have an answer? You may be studying chemistry because it fulfills an academic requirement, but if you consider your daily activities, you might find chemistry interesting for other reasons. Most everything you do and encounter during your day involves chemistry. Making coffee, cooking eggs, and toasting bread involve chemistry. The products you use—like soap and shampoo, the fabrics you wear, the electronics that keep you connected to your world, the gasoline that propels your car—all of these and more involve chemical substances and processes. Whether you are aware or not, chemistry is part of your everyday world. In this course, you will learn many of the essential principles underlying the chemistry of modern-day life.
Question: The cloud of electrons surrounding the atoms contain a ___________ charge
Choices:
positive
negative
Question: In an proton, however, there are more of one of particle than the other, making the atom have either a positive or negative charge.
Choices:
True
False
Question: What two masses in an atom are almost the same?
Choices:
protons/neutrons
electrons/neutrons
electrons/protons
Question: The interior of the nucleus does not contain positively charged protons.
Choices:
True
False
Question: What binds the electrons clouds to the nucleus?
Choices:
Electromagnetic force
gravity
Oxygen
Question: In an electrically neutral atom, the number of protons equals the number of ___________, thus cancelling each other out.
Choices:
electrons
protons
ions
Question: The force that allows atoms to bind together and form molecules is almost identical to what other force.
Choices:
gravity
Oxygen
Electromagnetic force
Question: What binds the electrons clouds to the nucleus?
Choices:
Electromagnetic force
gravity
Oxygen
Question: 50% of the mass of an atom is contained in the nucleus.
Choices:
True
False
Question: How do atoms exist?
Choices:
protons
neutrons
electrically neutral, ions
Question: Atoms are classified according to their numbers of protons and neutrons.
Choices:
True
False