Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
24 Cards in this Set
- Front
- Back
Why don't the protons in the nucleus repel each other?
|
They are held together by the strong nuclear forse.
|
|
What is a subatomic particle that has a positive electric charge?
|
proton
|
|
Are the atoms in a substance the same if the substance changes states?
|
Yes
|
|
What is at the center of any atom?
|
nucleus
|
|
The number of protons in an atom is called?
|
the atomic number
|
|
What is the smallest unit of a pure substance that still has the properties of that substance?
|
atom
|
|
What is a negatively charged atomic particle that is in constant motion around the nucleus?
|
electron
|
|
What is a subatomic particle that has the same mass as a proton but no electric charge?
|
neutron
|
|
What are the subatomic particles that make up an atom?
|
protons, neutron, and electrons
|
|
What are atoms that have the same number of protons but different numbers of neutrons?
|
isotopes
|
|
What is a pure substance that's made up of only one kind of atom?
|
element
|
|
What term describes the ability to bend or roll metal into sheets?
|
malleability
|
|
What element conducts heat and electricty well?
|
metal
|
|
What are elements that do not have the characteristics of metals?
|
nonmetals
|
|
This state of matter has a definite volume but no definite shape and takes the shape of its container.
|
liquid
|
|
This state of matter has a definite shape and volume.
|
solid
|
|
What is a table of the elements arranged according to their atomic number called?
|
periodic table
|
|
This state of matter has no definite shape or volume. It take on the shape of its container and expands or contracts to fill the container.
|
gas
|
|
A compound that reacts easily with other substances and turns blue litmus paper red is called?
|
acid
|
|
Elements that occur in combination with other elements is called?
|
compound
|
|
What are the three states of matter?
|
solid, liquid, and gas
|
|
What is a gas in which some of the electrons have been removed from the atoms or molecules so that the substance has free, negatively charged electrons and positively charged ions.
|
plasma
|
|
A compound that reacts easily with other substance but turns red litmus paper blue is called?
|
base
|
|
About what percent of an atom is made up of empty space?
|
almost 100 percent
|