Elements
Elements are made up of one type of _.
atom
Compounds are formed when _ (how many) _ (same or different) elements bond.
What are the two types of mixtures?
heterogeneous mixture and homogeneous mixture
Name the formula for finding the number of neutrons.
atomic mass-atomic number=neutrons
The columns of the periodic table are called _______ and tell us__________.
groups
How many valence electrons an atom has
Elements are made up of different atoms listed on _ _ _.
The Periodic Table
True or False: a compound is a type of pure substance.
True
Another word for a homogenous mixture...
solution
Give the subatomic particles for Aluminum
P=13
E=13
N=14
The rows of the periodic table are called ________ and tells us __________.
periods
how many energy levels (rings, orbitals) and atom has
Elements can't be broken down _ or _.
physically or chemically
Water is considered a compound because it has (how many) hydrogen & oxygen atoms?
2 - Hydrogen and 1-Oxygen
_ mixtures are when the particles look the same.
homogeneous
Which subatomic particles make up the mass of an atom?
Protons & Neutrons
Most of the elements on the periodic table are classified as _______________.
Metals
Elements are a type of _ _.
Pure Substance
True or False. Compounds can have 2 or more of the same element.
False. They can have 2 or more different elements.
_ mixtures are when the particles look different.
heterogeneous
Draw a Bohr model for a Chlorine atom.
(Teacher check for accuracy)
The most stable group of elements on the periodic table is _____________.
Group 18/Noble Gases
True or False. Elements can be solids, liquids, or gases.
True.
Compounds can only be separated _.
chemically
What states of matter can mixtures include?
3 - Solid, Liquid, and Gas
How many valence electrons does the element Lead have?
4
These elements have a metal-like appearance, but are not malleable or ductile.
metalloids