1
What is a mass number?
Atomic number + number of neutrons
Neutrons have a ______ charge.
What is : uncharged/ neutral
As you read the Periodic Table from left to right the atomic mass _______.
A. Increases, B: Decreases, C: Stays the same
What is: A, Increses
What two particles must be equal to form a neutral atom?
What is: protons and electrons
Define an Atom:
Is the smallest unit of matter that makes everything around us
The positively charged particle in an atom is?
A proton
How many protons does an Oxygen atom have ?
What is a molecule?
A combination of 2 or more atoms
When does the atom lose electrons
When the:
number of protons>number of electrons
What is the first group in the periodic table called?
Alkali Metals
What is a Magnet?
A magnet is a matter that is attracted to certain types of metals.
The electrons travel around _________ .
Energy levels
A pen contains which electrons?
Carbon, Hydrogen, Chlorine
What is the lightest element on the periodic table?
Hydrogen
What is a cation?
A negative charged Atom
What happens when 2 unlike poles in a magnet approached to each other?
They Repel
If an electron is added to a neutral atom, the charge will become ________.
Negative
What is: the atomic symbol for Magnesium?
Mg
What is the atomic symbol of Calcium?
Ca
What is the number of neutrons of an atom with Mass number= 12 and number of protons= 4
8
What is the atomic number?
What is: The atomic number is the number of protons in an atom.
The nucleus of an atom has a _______ charge. And Why?
Positive
Name an element that is in the Halogens group.
Chlorine
How many elements are on the Periodic Table?
118
What is a domain in a magnet?
A domain is a gathering of electrons in one side of the material that creates a magnetic field.