Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
25 Cards in this Set
- Front
- Back
|
State the general rule of thumb regarding the number of protons and electrons in an elemental atom?
|
For every proton you have an electron in an elemental atom
|
|
|
What are the 2 differences between isotopes?
|
Mass and the number of neitrons
|
|
|
which formula is this: 2 (n)squared?
|
Bohr's formula
|
|
|
What does the atomic number indicate?
|
The atomic number is equal to the number of protons in an atom's nucleus. The atomic number determines which element an atom is
|
|
|
What is the difference between potential and kinetic energy?
|
(a)Potential energy- stored energy
(b)Kinetic- energy in motion :one half mass times velocity squared |
|
|
What determines an element?
|
number of protons
|
|
|
What determines an isotope?
|
The number of neutrons
|
|
|
How would isotopes vary ? 2 ways
|
The mass and the number of neutrons
|
|
|
How are they the same?
|
because protons and neutrons are the same
|
|
|
What is One way to determine whether something is stable ?
|
The ocet rule
|
|
|
define the Bohr rule
|
Physicist formula tells you how many electrons can be in an orbital 2(N)squared
|
|
|
How does temperature apply to chemistry?
|
measurement of kinetic energy; how much energy there is in that environment to keep that movement going
|
|
|
atomic mass
|
it is a fraction (because it is an average)
|
|
|
energy of activation
|
enough available energy needed for a chemical reaction to occur
|
|
|
enzymes
|
are organic catalyst which arranges the reactants in a way that they are more likely to react
|
|
|
Why is an elemental atom electrically neutral but an ion is charged?
|
Elemental atoms have the same number of protons and electrons so it is neutral. However, if an atom say in the 1 category loses an electron because it forms a bond, it would become positively charged. For example Na gives up an electron to form with Cl. NA is NA+ and Cl becomes Cl- because Cl gains an electron
|
|
|
What two bits of information does the atomic number tell you?
|
it tells you the number of protons and the number of electrons in an elemental atom
|
|
|
What in theory would happen to matter in absolute zero?
|
Nothing would move and it would be destructed
|
|
|
What are 2 ways that isotopes of an element vary?
|
mass and the number of neutrons
|
|
|
Why do chemical compounds that are primarily composed of space appear solid?
|
because they are moving so fast
|
|
|
In reference to the periodic table, what is significant of columns 1A, 2A and 3A?
|
Elements in these columns will always form Ionic bonds
|
|
|
List the general rule of thumb when referring to columns 4A,5A,6A and 7A
|
Elements in this column can generally form both types of bonds
|
|
|
What is the relationship between size stability and reactivity?
|
The closer something is to being stable the more reactive it is, also the smaller something is, the more reactive it is
|
|
|
How does one determine an element?
|
One determines an Element by the number of Protons it has.
|
|
|
How would one find the number of protons an element has?
|
The Atomic number listed on the periodic table determines the number of Protons an element has
|
