States of Matter
What state of Matters particles are closely packed together?
Solid
Define Atoms
What matter is made of
What is an ionic Bond?
When atoms take or give valence electrons to become stable
What is a Chemical Reaction?
When the properties and energy change and you cannot observe this.
What are the properties of a solid?
Definite Shape and Volume
What is surface tension, and what does it affect?
An inward force or pull; water
What do Valence electrons help determine about an atom?
The Chemical Properties
What is a covalent Bond?
Bond formed when two atoms share valence electrons
What happens in an exothermic reaction?
Energy gets released and heat is produced.
What are the properties of a liquid?
Definite Volume but no definite shape
What is it called when the particles of a solid have enough energy to become a gas?
Sublimation
Why do atoms form bonds?
To become stable
What is a Metallic Bond?
When the protons in the nucleus are surrounded by electrons, the electrons can move freely.
What happens in an endothermic reaction?
Energy is absorbed and causes the surroundings to cool down.
What are the properties of a gas?
No definite shape or volume
What happens when the temperature of a gas at constant pressure is increased?
The volume increases
How many valence electrons does Helium need to become stable?
It needs 2
When Atoms Bond, how many valence electrons do they need to be stable?
They need 8 valence electrons to become stable.
What does LoCoM state about chemical reactions?
during chemical reactions matter cannot be created or destroyed
Why is H20 different from other solids?
It doesn't follow the rules, it is denser as a liquid not a solid and as a solid it's particles are arranged in a pattern
If the particles in a gas are heated, what happens to them?
The particles move faster and have greater energy.
What are the rows and columns called in the periodic table?
Rows are called Periods and Columns are called Groups
What is a Chemical Bond?
force of attractions between atoms as a result of electrons rearranging.
In a chemical reactions what happens to the atoms?
They stay the same, any atoms present in the beginning of a reaction will be present at the end.
What is matter?