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Kj's science flash cards
How do you find the mass if an atom?
12 cards·by kaitlynjoel
neutrons + protons =
How do you find the mad of an atom?
Neutrons + protons = mass of atom
What is reactivity on the periodic table?
If an element has 1 or 7 valence electrons, they have more reactivity then an atom with 18 v.a.
What is so so special about group 17 and why is it more reactive then it should be?
They can gain an atom need only one atom to create a full set
If an element has 10 protons then what characteristics does it have?
Electrons, atomic mass and buttons at all the same, NO REACTIVITY
What do sub scripts represent and how are they used?
The # of atoms of an element in an equation ex: H2O
Evidence for chemical change?
Color change, bubbles, fire, temperature change, new substance
How do mass of the reactants in a chemical equation compare to mass if products?
When there is a chemical change the mass STAYS THE SAME
How do you calculate speed?
Distance/time
question
answer
Acceleration due to gravity?
The constant 9.8 m/s2
Why is acceptation du to gravity different on other planets?
Heater mass = more gravity
Describe how acceleration and in balanced forces are related
To accelerate there has to be an unbalanced force