elements and compounds Flashcards
What is an atom
An atom is the smallest particle of a chemical element that can exist.
Name the first 20 elements
- Hydrogen (H)
- Helium (He)
- Lithium (Li)
- Beryllium (Be)
- Boron (B)
- Carbon (C)
- Nitrogen (N)
- Oxygen (O)
- Florine (F)
- Neon (Ne)
- Sodium (Na)
- Magnesium (Mg)
- Aluminium (Al)
- Silicon (Si)
- Phosphorus (P)
- Sulphur (S)
- Chlorine (Cl)
- Argon (Ag)
- Potassium (K)
- Calcium (Ca)
How do you work out the name of an element
The symbol for example H20 H is for Hydrogen and O is for oxygen.
How do you work out the number atoms
The small number is how much of the element is in there.
what happens to the particles in a chemical reaction?
The particles breaks bonds between the reactant molecules.
What is hydrogen fuel?
What are the advantages and why is it still a problem
Hydrogen fuel is burned as fuel. It is used in fuel cells or internal combustion engines.
Qualities of metals
tend to be shiny, good conductors of heat, solid at room temp
Qualities of non metals
tend to be dull, bad conductors and brittle
what is a Compound
two or more different atoms
what is a pure substance
A pure substance is a form of matter that stays the same. Example is gold.
what is a mixture
A substance made by mixing other substances together.
what is a molecule
two or more atoms that are together
what is the peroidic table song thingy
H HeLe BeBCaNoff Nena MaGI SipS Clagka
what is the positive part of an atom called
proton
what is the negative part of a atom called
electron
what is the netural part of an atom called
netural
example of a molecule
oxygen molecule
first element to be discovere
phorophrous
What are the two types of elements found on the Periodic Table
- Atom
- Compound
how are the elements arraanged
by the atomic number
A chemical formula is:
A way to tell which elements are in the compound (H20)
builidng blocks of the human body
Oxygen 65%
Carbon 18%
Hydrogen 10%
Nitrogen 3%
Calcium 2%
Phosphorus 1%
Other elements 1%
what is percentage of water in your body
65 percent
