7.PS1.1
These particles are found in the nucleus of an atom
What are the protons and the neutrons?
He, H and C are examples of...
What are elements?
This is made of only a single element or a single compound
What is a pure substance?
This law states that matter cannot be created or destroyed
What is the law of conservation of mass?
The horizontal rows on the Periodic Table are called this
What are periods?
These particles have a negative charge and rotate around the nucleus
What are electrons?
H2O, CO2 and H2O2 are examples of...
What are compounds?
This is made of a cmobination of different elements or compounds combined by physical means
What is a mixture?
This is the smallest measure of matter that has to be counted in order to balance a chemical equation
What are atoms?
The vertical columns on the periodic table are called this
What are groups or families?
These particles are associated with the atomic number?
What are protons?
This is made of more than one element combined with chemical bonds
What is a compound?
Homogenous and Heterogenous are examples of this
What are mixtures?
The small number sometimes seen inside of a chemical formula of a compound
What is the subscript?
Groups or families on the periodic table share this chemical property
What is similar chemical reactivity?
These two particles account for the Atomic Mass Number
What are protons and neutrons?
This is the smallest unit of matter represented by a capitol letter on the Periodic table
What are elements?
Elements and Compounds can be classified as this
What are pure substances?
The number before a compound in a chemical reaction that represents more than one of that compound is this
What is a coefficient?
The outer shell of electrons for an element that determine an atom's reactivity are called what?
What are valence electrons?
What specific particle number do elements in the same group/family have in common?
What is valence electrons?
When two atoms of the same element are held together by a chemical bond they are called this.
What is a diatomic element?
The substance NH3 can be broken down by this type of reaction
The number of Oxygen atoms in the reactants side of this equation is 6H2O + 6CO2 ----> C6H12O6 + 6CO2
What is 18?
The atomic number of Oxygen is 8. This means it has 8 of what subatomic particle
What are protons?