Science Test Revision Flashcards
Get 100% on the science test - Term 2
What is a period in science?
The horizontal line on the periodic table
Science solutions
What is a Homogenous Mixture?
This is one of the four types of mixtures
A mixture that the solute has been dissolved into the solvent so that there is no visible particles in it
What is density
Density is a word we use to describe how much space an object or substance takes up (its volume) in relation to the amount of matter in that object or substance (its mass).
What is a group
A group contains elements with same number of electrons in their outermost shell due to which they show similar properties.
What is density
Density Definition: Density is the measurement of how tightly a material is packed together.
Examples of low-density objects:
a bag of cotton or pumice rock
Science Chemistry
What is the Atomic Number?
It is at the corner of an element that is showed on the periodic table
It is the number of protons in the element
This is a theory that is used on the test next monday
Atomic Structure (remenber this)
Remenber this
REMENBER!!!!
Protons: Positively charged
Neutron:Neutral/no charge
Electrons: Negetive charge
Shells/group: The ring outside
Nucleas: the center part
Formula to calculate density:
density = mass / volume
How to find the mass number of a element
mass number = protons + neutrons.
What is groupings
a column in the periodic table of the chemical elements. In a group, the chemical elements have atoms with identical valence electron counts and identical valence vacancy counts.
What are the three states of matter?
Solid, Liquid, Gas
What are Elements?
Pure substances containing one kind of atom.
What charge is the nucleus?
Positive
What kind of mixture is a Colloid?
It is when there are 2 or more mixtures, mixed together but not chemically combined.
