Atoms
This particle lives in the energy level of an atom
What is an electron
Which element do we breathe in?
What is oxygen
Air is matter - true or false
What is true
Who is considered the "father" of the periodic table
Who is Dmitri Mendeleev
In order to calculate the number of neutrons in an atom, you would subtract the ____________ from the ___________.
What is atomic number and the atomic mass
Which group of elements are non-reactive
What are the noble gasses
Which state of matter has the slowest particle speed
What is a solid
Elements in the same group share important _______
What are properties
These are atoms of the same element that have different numbers of neutrons.
What is an isotope
This group of elements is extremely reactive
What are the halogens or alkali metals
What is conserved during a chemical reaction?
What is mass
How many electrons will fill the second energy level
What is eight
The proton lives _______ the nucleus
What is inside
A column of elements is called a ___________
What is a group
What is the volume of a rectangle that measures 2cm high by 3cm long and 2 cm wide?
What is 12 cm3
There are _________ metals than nonmetals
What is more
The chemist that developed the model where you place electrons on the circular electron cloud is
Who is Bohr
After metals, which group has the most elements in it?
What is a non-metal
Which state of matter has the weakest inter molecular force?
What a gas
Elements in the same row across belong to the same ____________
What is period