Bonding
How is a covalent bond formed (think electrons)?
Electrons are shared between two atoms
The atomic number of an element represents the number of ______ in an atom?
Protons
What substance can NOT be broken down into simpler substances?
An element
What does exothermic mean?
Heat exits/is released making it feel hotter
What part of an atom contains the positive charges
Nucleus/Protons located in the nucleus
How is an ionic bond formed (think electrons)?
Electrons are transferred from one atom to another
Elements are arranged in the periodic table according to increasing...
Atomic number
Salt (NaCl) can be identified as a ________.
Ionic Compound
This type of chemical reaction combines together individual elements to form a compound?
Synthesis
What are valence electrons?
Electrons located in the outermost shell of an atom
Why do atoms form bonds?
To become more stable
In group 1 of the periodic table and are very reactive are the ……
Alkali Metals
What type of reaction is shown below?
CH + O2 —> CO2 + H2O
Combustion
What is a chemical reaction?
a new substance/product is made
How many different types of atoms make up a molecule of carbon dioxide (CO2)?
2 different types of atoms (C and O)
Carbon (C) has 6 electrons in it's valence (outer) shell. Which atom is Carbon likely to bond with?
Sulfur (6 valence electrons.)
Bromine (7 valence electrons)
Beryllium (2 valence electrons)
Hydrogen (1valence electron)
Beryllium (2 valence electrons)
Why are noble gasses (Group 18) so unreactive?
Their outer shell is full
Predict the product and balance
Ca + O2 —>
2Ca + O2 —> 2CaO
This type of chemical reaction causes one compound to split into individual elements
Decomposition
When is an atom most stable?
When it has a full outer shell (typically 8 valence electrons)
2 bonding 2 lone pairs
How many neutrons does an atom of copper (Cu) contain if the atomic number is 29 and the atomic mass is 63?
34 neutrons
Predict the products and balance
HCl + Ba(OH)2 —>
2HCl + Ba(OH)2 —> BaCl2 + 2H2 O
Create a balanced chemical question from the following skeleton equation:
CH4 + O2 --> CO2 + H2O
CH4 + 2O2 --> CO2 + 2H2O
Identify the products of the following reaction:
Mg + O2 -->
Reactants: Mg and O2
Products: MgO