Parts of an atom
Electrons have a negative charge
What kind of charge does an electron have?
A group is a vertical column of elements
What is a group
The metals are located to the left of the periodic table
Where are most of the metals located?
Uses chemical symbols and #s to represent a given substance
What is a chemical formula?
Electrons move around the nucleus, has a negative charge, and has a mass of almost 0u
What are electrons?
Located in the nucleus
Where are protons and neutrons located?
There are 118 elements
How many elements are on the periodic table?
They border the zigzag of the periodic table
Where are the metalloids located?
Process in which atoms are rearranged to produce new substances
What is a chemical reaction?
If the number of protons is 18 and there is 19 neutrons how many electrons are there?
There is 18 electrons
Atom is the smallest particle in which an element can be divided
What is an atom?
It's organized by atomic number
How is the periodic table organized?
The group 18 is the noble gases
What group are the noble gases in?
Exothermic is when energy is released and endothermic is when the reaction requires energy
What is the difference between exothermic and endothermic reaction?
The negative charges will move from the cloth into the balloon if rubbed
If we rub cloth on a balloon will the negative charges from the cloth move to the balloon or will the positive move into the balloon?
Electrons are found around the nucleus
Where are electrons found?
Horizontal row that increases the atomic # from left to right
What is a period?
There are 18 groups in total
How many groups in the periodic table
The rate is the speed of the reaction
What is a rate of an reaction?
They repel each other if they are both negative electrons
What happens if two negative charges touch each other?
Neutrons are neutral
What charge does a neutron have?
Lanthanides and Actinides
What group of elements are in the second row?
There are 6 periods in total
How many periods are in the periodic table?
States the matter is neither created nor destroyed
What is the LCM?
No we use electron clouds because they move very fast.
Can we see electrons?