Random
What is the chemical symbol of calcium?
Ca
Where is the atomic number located?
At the top of an atom box
What is the atomic mass of copper?
58.93
T or F. All pure substances are elements.
What is True?
Compound or mixture: salad
mixture
What is the chemical symbol of potassium?
K
Name the 3 Subatomic particles
How many Groups are there in total?
What is 18?
Which one of the following is an element?
a) Gold
b) Water
c) Pure salt
d) Sea water
What is A?
Compound or mixture: water
compound
The two parts of a solution are the ___________.
solute and solvent
What are the charges of a proton and electron?
Protons: positive
Electrons: negative
Atomic mass is sometimes called ______ ________.
atomic weight
How many elements are there on the Periodic Table of Elements?
118
A type of homogeneous mixture formed when one substance dissolves into another.
What is a solution?
What is the difference between atomic number and mass number?
The sum of the number of protons and neutrons in an atom.
What does the atomic number tell us?
Number of protons and number of electrons in an atom
What is the definition of atomic mass?
the total mass of particles of matter in an atom (protons + electrons + neutrons)
Which particles are in the nucleus?
protons and neutrons
When lemonade powder is dissolved in water, what is the solvent?
Water
What are the three element classes?
Metals, nonmetals, and metalloids
In a neutral atom, the number of protons (+ charge) always equals ______________
Number of Electrons
How many atoms are present in one molecule of glucose, C6H12O6?
a) 3
b) 4
c) 12
d) 24
What is 24?
How many neutrons in an atom oxygen?
8
What is the difference between compounds and mixtures?
Mixtures - physically combined (can be easily separated)
Compounds - chemically combined (cannot be easily separated).