Chemical Formulas
What is the Chemical Formula for Carbon Dioxide?
CO2
What is the atomic number for Hydrogen?
1
What is an ion?
An atom that loses or gains one or more electrons and becomes charged
What is the Law of Conservation of Mass?
No atoms are ever created or lost during a reaction
Which subatomic particle never changes in number between atoms of the same element?
Protons
What do you call the substances you begin with in a chemical reaction?
Reactants
What is the chemical symbol for Potassium
K
What is an ion with a negative charge called?
Anion
How does this law apply to balancing equations?
When we balance equations, we are showing that no atoms are ever lost or gained
What is a property of a metal?
- Lustrous/shiny
- Malleability
- Ductility
- Sonorous Nature
- High melting and boiling points
Identify the Elements in this compound: Na2B4O7
Na - Sodium
B - Boron
O - Oxygen
What is the atomic number for Fluorine?
9
Predict whether Lithium (atomic number = 3) is more likely to become an anion or a cation.
Cation
Is this equation balanced?
2H2 + O2 → 2H2O
Yes
Define the term Isotope
An isotope are atoms of the same element with differing numbers of neutrons
What does the arrow represent in a chemical equation?
Represents the transformation of reactants into products
Which group on the periodic table increases in reactivity as you move down?
Alkali
How many electrons are in the outer shell of Carbon?
4
What can you add or change in order to balance an equation?
Add numbers in front of compounds - never change to small numbers
Which is the most reactive Alkali?
Francium
What is the chemical formula for glucose?
Which group is the most stable?
Noble gases
Anion
Balance this equation.
CH4 + O2 → CO2 + H2O
CH4 + 2O2 → CO2 + 2H2O
Whose model of the atom do we refer to today?
John Dalton