Atoms
The building blocks of all matter are called
Atoms
What are the abbreviations for elements, listed on the periodic table, called
Elemental or chemical symbols
A substance that is made up of different elements is called a
Compound
What is the small number to the right of an element symbol that tells us how many atoms there are?
Subscript
How many elements are in C6H12O6
3
What subatomic particle has a neutral charge
Neutron
A pure substance made up of only one type of atom is called an ____________
Element
A _______ is a particle with more than one atom and is the smallest unit of bonded atoms.
molecule
What is the larger number in front of an element or a compound called?
Coefficient
How many atoms TOTAL are there in H2SO4
7
An electron has a ___________ charge
negative
Most of Earth's atmosphere is made up of what two elements?
Nitrogen and oxygen
Is this a molecule of a compound?
H20
Yes
A _________ formula tells us what elements and how many atoms a chemical is made of.
Calcium has an atomic mass of 40 and contains 20 neutrons, how many protons does calcium have?
20
Atoms are made up of three basic parts, which are
Protons, neutrons, electrons
The ___________ number is how the elements are arranged on the periodic table and tells us how many protons are in an element.
Atomic
True or False:
Atoms in molecules are bonded by electrons
True
What are the chemicals to the left of the arrow called in a chemical equation
The reactants
How many oxygen atoms are found in the product of this chemical equation?
6O2 + 6H2O ---> C6H12O6 + 6O2
18
The nucleus is made up of _________ and ___________
Protons and Neutrons
The ________ __________ of an element, listed on the periodic table, is the number of neutrons and protons combined
Atomic Mass
Is this a molecule of a compound?
O2
No
A chemical equation represents a _________ _________.
chemical reaction
Balance the equation:
H2+Cl2 --> _HCl
2HCl