Atoms
What is the center of an atom called?
The nucleus
Where can you find elements? (what is the chart called)
The Periodic Table
When two or more of these join together, you have a molecule. What are they?
atoms
Who is the man that a model is named after which shows the electron cloud outside the nucleus of the atom?
Neils Bohr
What do you call the area where the electrons orbit the atom?
electron cloud
What do you find in the center of the atom?
Protons and Neutrons
The symbol for carbon is _______.
C
When you have two different TYPES of atoms, such as oxygen and hydrogen, that forms a _________.
compound
Which element on the periodic table has an atomic number of 13?
Aluminum
Which element on the periodic table has an atomic mass or weight of 20? (21 if you're rounding)
Neon
What can you find in orbit around the atom?
electrons
The number at the top of the element is called the _______ _______.
Atomic Number
True or False: When two atoms or elements combine to form a compound, it is something new and the old properties of each element don't exist anymore.
True.
Which element has a symbol of Pt?
Platinum
The periodic table is made up mostly of - metals, nonmetals, or metalloids.
metals
Name the charge of each of these parts of the atom: proton, neutron, electron.
positive, neurtral, negative
Where can you find the atomic weight or atomic mass?
At the bottom of the square.
When two atoms joined together are the same, it is not a compound, it is an ___________.
element
True or false: All elements on the periodic table are made up of matter, so gases are not found on the table.
False: gases still have matter
Why is H20 not on the periodic table?
It's not an element, it's a compound.
It has more than one type of atom in it.
Atoms are the smallest building blocks of _______.
matter
What does the atomic number also tell us about how many of this thing is in the nucleus?
protons
Scientists use models to show how molecules or atoms are arranged. What is one of the names of these models?
ball and stick model
How many protons are found in the element boron?
5
How many protons are found in the element Neptunium?
93