Chemistry 1
A reaction that feels cold to touch.
What is an endothermic reaction?
When two or more atoms are joined together chemically they have made a ....(can be the same element)
What is Molecule
Is the water is a saltwater solution the solute or the solvent?
What is solvent?
---------- is known as the universal solvent
What is Water
Water is made of these two elements
What are hydrogen and oxygen?
This reaction has reactants that have more energy than products and they feel hotter to touch.
What is an exothermic reaction?
The chemical reaction plants use to make food from sunlight
What is photosynthesis?
A substance formed by chemically combining two or more atoms of different elements is known as
What is Compound
CH4+2O2 → CO2+2H2O
This is a certain type of reaction.
What is double replacement?
Giving off heat or light is a clue that this type of a change is occuring.
What is a chemical change?
Neon and Argon are examples of
What are Gases
A reaction between an acid and a base that produces salt and water.
What is a neutralization reaction?
The term that refers to anything that occupies space, physical and chemical properties and exists in gas, liquid or solid form
What is matter?
Russian scientist who developed the periodic table
Mendeleev
The elements can be found in the far right group of the periodic table
What are noble gasses?
There are this number of elements on the periodic table of the elements.
What is 118?
The molecular shape that has 2 bonds and 2 lone pairs.
What is bent?
Increasing temperature affects the movement of molecules in this way.
What is molecules move faster?
Elements represent unique forms of these little thingies. The building blocks of everything!
What are atoms.
When one chemical changes its state of matter, the change is called
What is Physical Change
The atomic number tells us this.
What is the number of protons?
Type of bonding that forms an electron cloud.
Metallic
Name 4 types of chemical reactions
Decomposition, synthesis, single replacement, double replacement, combustion
Type of bonding that forms crystal lattice.
Ionic
This is the smallest type of atom.
What is Hydrogen.
The name of Na2SO4
What is sodium sulfate?
This type of reaction is called...
AB -----> A + B
What is decomposition?
Refers to the outer orbital of an atom or the electrons found in the outer shell.
What are the valence electrons?
The number in front of a reactant or product in a balanced chemical equation.
What is coefficient?
The formula for combined gas law.
What is P1V1/T1 = P2V2/T2?
Type of bonding where electrons are shared.
covalent
Elements on the left side of the periodic table. They are malleable, shiny, conductive, and solid at room temperature.
What are alkali metals?
What type of reaction is this?
CxHy + O2 ----> CO2 + H2O
a) synthesis
b) decomposition
c) combustion
What is combustion?
What is an intermolecular force?
The bonds between atoms.
Atoms of the same element with different numbers of neutrons
Isotopes
Most of the periodic table is made this type of element
What are metals?