Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
25 Cards in this Set
- Front
- Back
What are all substances made out of?
|
Atoms
|
|
What do you call a substance that is only made out of one type of atom?
|
An element
|
|
How many different elements are there in the periodic table?
|
About 100
|
|
What are elements shown in?
|
The periodic table
|
|
How is the periodic table ordered?
|
They are grouped by similar properties
|
|
What are different elements represented by?
|
Chemical symbols
|
|
What are atoms made up of?
|
Protons, Neutrons & Electrons
|
|
What kind of charges do:
Protons Neutrons Electrons Have? |
Protons: +1
Neutrons: 0 Electrons: -1 |
|
How many protons do atoms have?
|
The same amount as electrons
|
|
Do atoms have an overall electrical charge?
|
No
|
|
Do atoms of the same element have the same number of protons?
|
Yes
|
|
How do you find out the number of Protons?
|
It is the same as the atomic number of the element
|
|
What does the mass number of an element mean?
|
It is the sum of the number of Protons and Neutrons
|
|
What gives elements similar properties?
|
Elements in the same group having the same number of electrons in their outer shells
|
|
What are the Noble Gases?
|
Noble Gases are all the elements in group 0, they are unreactive as their atoms have stable arrangements of electrons
|
|
What is group 1?
|
Group 1 is the alkali metals
|
|
How many electrons do group 1 have in their outer shell?
|
1
|
|
What is a chemical reaction involving elements?
|
A chemical reaction involving elements is when two or more elements react to form compounds
|
|
What does a chemical reaction involving elements involve?
|
It involves giving, taking or sharing electrons
|
|
What does a chemical reaction involving elements produce?
|
Molecules or ions
|
|
What do compounds formed from metals consist of?
|
Ions
|
|
What do compounds formed from non-metals consist of?
|
Molecules
|
|
What can chemical reactions be represented by?
|
Word equations or symbol equations
|
|
Are atoms lost or made in reactions?
|
No
|
|
Does the reactants' mass equal the products' mass?
|
Yes
|