atoms and elements Flashcards
On which part of the periodic table do you find non-metallic elements?
Right hand side
What is the smallest part of an element that can exist?
Atom
Group 1 in the periodic table is also known as
Alkali metals
Group 7 in the periodic table is also known as
Halogens
Helium, Neon, Argon and Krypton are found in group 0 and they are examples of
Noble Gases
Defin a molecule
A defined group of non-metal atoms that are chemically bonded
Define a compound
Two or more elements chemically bonded in a fixed ratio.
Potassium phosphate contains potassium, phosphorous and what else?
Oxygen
Define a mixture
Two or more elements or compounds are present without being chemically bonded together.
Define a lattice
A regular three-dimensional arrangement of atoms (or ions) in a solid
How does mass change in a chemical reaction?
It doesn’t, the total mass = total mass of products
Which particles are found in the nucleus
Protons and Neutrons
Charge of an electron
Negative
Which subatomic particles have the same mass
Protons and Neutrons
Overall charge of an atom
0
What does the the atomic number tell us
The number of protons, from this we can find the element
What does the mass number represent
Number of Protons + Number of Neutrons
Charge of a neutron
0 no charge
How many electrons can fit in the first electron shell
2
What is the maximum number of electrons that can fit on the second electron shell?
8
What can electron shells also represent
Energy levels
