Atomic structures Flashcards
Why are atoms neutral
There are the same number of protons and electrons
What is the atomic number
The number of protons
What is the mass number
The number of protons and neutrons
Are protons positive or negative
Positive
Are electrons positive or negative
Negative
Where are the protons, neutrons and electrons located
The protons and neutrons are found in the nucleus and the electrons are around the edge
What does AMU start for
Atomic mass unit
What is in the periodic table
A table of chemical elements, arranged by atomic number
Which group number is alkali metals
Group 1
What is group 7
Halogens
What is group 0
Noble gases
What is an isotope
Atoms with the same atomic number but different mass numbers
What is the mass of a proton
1 amu
How do you know which element goes first
The one nearest the left comes first
What is the mass of a neutron
1 amu
What is a compound
When elements combine or join together and new substances are formed
How many electrons can the first energy level (the one nearest the nucleus) hold
2
If there are only two elements in a compound what ending will it have
ide
If a compound with three elements contains oxygen what ending will it have
ate or ite
Name the prefixes from 1 - 6
Mono, di, tri, tetra, penta, hexa
Describe the valency number pattern
1,2,3,4,3,2,1,0
What is the mass of an electron
0 amu
Describe the five steps of writing a chemical formula
Write the symbols, write the valencies, swap the valencies, simplify in needed, write the formula
The substances you start with in a chemical reaction are called the ______ and the new substances are called the _____
Reactants and products
