types of reactions 1
what is oxidation?
to describe the loss of electrons.
What are the four main types of reactions?
direct combination, analysis reaction, single displacement, and double displacement.
what does the subscript represent?
the number of atoms in a molecule
what are the 4 different types of bonds
ionic bond, covalent bond, non polar, polar bond, hydrogen bond
a negative ion
what does reduction mean?
to describe the gain
when does a combustion occur?
symbols must have at least...
1 capital letter
are hydrogen bonds weak, moderate, or strong
Hydrogen bonds are weak.
What can only change the family of an element?
By the number of electrons
What is Decomposition?
A compound broken into smaller elements
What are the products in this equation?
chlorine + sodium bromide ---> bromine + sodium chloride
bromine + sodium chloride
The atoms we study are neutral, which means they have the same number of...
Protons and Electrons
Is polar cohesive? and how?
polar is cohesive because it attracts water with water
What do covalent bonds do?
They keep atoms together in a molecule.
True or false?:
The reactants are the new materials produced during a chemical reaction
False
How many hydrogen, oxygen, carbon atoms in H2CO3?
2 hydrogen, 1 carbon, 3 oxygen
what is the small group of elements called that include symbols C,N,O
non metals
Which one is stronger covalent bond or ionic bond? and why?
Bonded together (ionic) because in a covalent bond they are just sharing.
How is the number of neutrons in the nucleus of an atom calculated?
subtract the number of protons from the mass number
what kind of 2H2Ochemical reaction is this
2H2O → 2H2 + O2
Decomposition
What kind of chemical reaction is this?
S + O2 → SO2
Synthesis
If an atom has 6 protons and 8 neutrons what is the atomic mass and it's name?
Atomic mass- 14
Name- Carbon
What elements generally make an ionic bond?
metal and nonmetals
what is dalton's atomic theory?
Its when matter is composed of extremely small particles called atoms.