Question | Answer |
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 |