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Matter
Elements
Atoms
Periodic Table
Chemical Formulas and Compunds
100
Describe matter. *Give two examples that describe matter.
Matter is anything that has mass and takes up space. *Balloon *Cup of water.
100
What is an element?
An element is a substance that cannot be chemically broken down into simpler substances.
100
What is an atom?
An atom is the smallest part of an element that can be identified as that element.
100
What way does a group from the periodic table goes? What way does a period form the periodic table goes?
*Vertical *Horizontal
100
What is a molecule and a chemical bond?
A molecule is the smallest part of a substance that has all the properties of that substance. A chemical bond is the force of attraction that holds atoms together.
200
What are the four properties of matter? *Give the definition for each one of the properties.
Mass and Volume are the two properties and the other two properties are Weight and Density.
200
How many known elements are found in nature and how many elements have been made by scientists?
There are more than 100 known elements. Most of the first 92 elements are found in nature, the rest of them are the ones that scientists have created.
200
Name the tree main subatomic particles that make up an atom.
*Proton *Nucleus *Electrons
200
What is a chemical symbol? And how are they written.
A chemical symbol is a shortened way of writing the name of an element, when writing a chemical symbol the first letter of a chemical symbol always has to be capitalized is there a second letter it's written in lower case.
200
What is chemical formula and a subscript?
A chemical formula is the way of writing the name of a compound using chemical symbols. A subscript is a number written to the lower right of a chemical symbol in a chemical formula.
300
What does the word properties means?
Properties are the characteristics used to describe an object.
300
Give two examples of a substance made up of more than one element.
*Sugar *Water
300
Where are the tree subatomic particles found and what charge do they have?
*Protons are found in the nucleus. *Neutrons are found in the nucleus. *Electrons are found in the shell.
300
How do you obtain the number of neutrons?
AMU- A#= Neutrons
300
What is a compound? Give two examples of a compound.
A compound is a substance made up of two or more elements that are chemically combined. *Sugar *Table Salt
400
What is the difference between mass and weight?
The difference between mass and volume is that your weight can change but your mass will never change.
400
What are tree elements that make up sugar?
*Carbon *Hydrogen *Oxygen
400
List the 4 parts of Dalton's Atomic Theory.
*Atoms from same elements are exactly the same. *Atoms cannot be divided. *Atoms of different elements are different from each other. *Atoms of two or more elements can join together to form types of matter called compounds.
400
Who was the first person to create to create a periodic table?
Dmitri Mendeleev was a scientist that in 1869 created the periodic table.
400
Name two ways to break a chemical bond.
*Heat *Electricity.
500
What is chemistry?
Chemistry is the study of the structure and the makeup of matter and the changes.
500
Are all the elements solids at room temperature?
No, most elements are solids at room temperature the rest are liquids at room temperature or gases at room temperature.
500
What is the atomic mass for a neutron, proton and electrons?
The amu for a neutron is 0 The amu for a proton is 1 The amu for an electron is 1
500
What does the word periodic means? What does atomic number?
A periodic is a repeating pattern. An atomic number is the number of protons of an element.
500
When hydrogen combines chemically with oxygen what does it forms?
It forms hydrogen peroxide or water.