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Chemistry Review HMS

Chemistry Review

QuestionAnswer
When looking at a chemical formula, how do you know how many elements are present? Count the capital letters.
When elements chemically combine it makes a? Compound
When you need to substitute an element with something similar, pick something that is in the same? Family/Column
Matter cannot be created or destroyed Law of Conservation of Mass
In a chemical reaction, something ______ is created. New
How many molecules are in this formula: 3CHO? Three molecules.
When the product and reactant side both have the same number of element atoms, it is considered to be? balanced
New substances produced by a chemical reaction are called? Products
The elements that combine together to make something new in a chemical reaction are called? Reactants
If the mass of the reactants is 100 grams then the mass of the products must also ________ 100 grams. Equal
You can find the protons or electrons of an element by looking at the? Atomic Number
You can find the _________ of an element by subtracting the mass number by the atomic number. Neutrons
A __________ change would include key words like dissolving, mixing or cutting. Physical
A __________ change would include key words like burning, rusting or dying. Chemical
When food is past its expiration date, the food is spoiling or souring. This is what type of change? Chemical
This formula is found by finding the mass divided by the volume of an object. M/V Density
When elements are in the same rows they have the same number of? Valence electrons
When elements are in the same column or family they have similar? Properties
Elements are arranged on the periodic table in order of increasing? Atomic number
How many electrons fit into the first ring? 2 electrons
How many electrons does the second ring hold? 8 electrons
Elements to the left of the zig zag line on the periodic table are called? Metals
Elements to the right of the zig zag line are called? Non metals
Created by: chanteb