Atoms
Periodic Table
Random
Elements and Compounds
100
This is at the center of every atom
What is a nucleus
100
What does an element's atomic number represent
The number of protons in an element
100
This is a chart that lists all the elements that scientists have discovered
What is the periodic table of elements
100
Which of the following cannot be broken down to something simpler: Element Compound
Element
200
These two particles make up the nucleus of an atom
What are protons and nuetrons
200
What do the colors on the periodic table represent
Which elements are solids, liquids, and gasses at room temperature
200
How is the periodic table helpful to scientists
Because it organizes the information to make it easy to find
200
A chemical formula is a lot like a ___________ that you would follow to make food.
recipe
300
What is the role of an electron in an atom?
They circle the nucleus and have a negative charge
300
What is a characteristic of all metals?
They conduct heat and electricity
300
How many elements are there on the periodic table?
116
400
What forms when two atoms combine
A molecule
400
Why is water not on the periodic table?
Because it is a compound
400
If a compound has two atoms of aluminum (Al) and three atoms of oxygen (O) what could its chemical formula look like?
Al2O3
400
In a chemical formula what does the little number below a chemical symbol tell you?
The number of atoms of that element in the compound
500
What is a compound
A molecule made up of two or more different types of atoms
500
When scientists see the "AU" they know it is gold. What is "AU"
The elements symbol
500
In an atom, what is the number of protons equal to?
The number of electrons
500
What needs to happen in order for elements to form a compound?
A chemical reaction
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