Chemical Properties

Cards (20)

What is an atom? 
A basic unit of matter consisting of electrons surrounding a nucleus that contains protons and neutrons
What is an element? 
A substance made from only one type of atom
What is a compound? 
A substance made from different atoms joined togther
What does the atomic number show?
The number of protons and electons
What does the atomic mass show?
It shows the total number of protons and neutrons in an atom
What are the 2 types of bonding structures?
Ionic and covalent
What is an ionic bond? 
A bond with a metal and a non-metal by transferring electrons from the outer shell
What is a covalent bond? 
A bond between two non-metals that share electrons. The bond is always a pair of atoms, each from the different element.
How to calculate density?
Mass/Volume
How to calculate pressure?
Force/Area
What sub-atomic particles does the nucleus contain?
Protons and neutrons
Who made the periodic table?
Dmitri Mendeleev
What is an isotope?
Atoms with the same number of atoms but different numbers of neutrons
How does an isotope naturally form?
It forms through radioactive decay of a nucleus
What is the melting point of ice?
0℃
What are the 3 main states of matter?
Solid, liquid, gas
Why do some objects sink under water?
Because the objects density is heavier than water
What is a molecule?
A group of two or more atoms held together by attractive forces known as chemical bonds
What is the process of water turning into ice?
Freezing
What is the process of water to air?
Evaporation