Atoms Flashcards
(40 cards)
Cant be created or destroyed
Matter
can’t be broken down into other substances
Element
Vital to life get less then 1% is needed
trace elements
Smallest unit element that still has the same chemical properties
atom
Let off a positive charge, is in the nucleus of the atom
proton
No charge, in the nucleus
Neutron
negative charge, orbits the nucleus
electro
a or more atoms come together, by taking away or charing
molecule
protons and neutrons, weight of atom
atomic mass
number of protons
atomic number
unbalanced number of protons and electrons
Ion
Electon shevles 1st level holds \_\_\_ electrons 2nd level holds \_\_\_\_ electrons 3rd level holds \_\_\_\_ electrons 4th level can hold \_\_\_\_ electrons 5th level can hold \_\_\_\_\_ electrons
2 8 18 32 50
Electrons on the outer most shell
does not want to combine with other atoms
Valence electrons
When outer most energy shell is not full, atoms want to fill or get rid of their electrons
electron behavior
Same number of protons but different number of neutrons, unstable, radioactive
Isotopes
14c is unstable, causes the nucleus to decay spontaneously giving off energy
used in medicine, dangerous in large amounts
Radioactive isotopes
One of more electrons get passed to another element -very weak -usually between mental and nonmetal NA will pass one electron Chlorine will accept on electron
Ionic bond
Share electrons between two elements
- very strong
- occur between nonmetals
Convalent bond
share electrons unequally
polar covalent
shares electrons equally
non-polar covalent
attractive interaction of a hydrogen atom with.a electronegative atom
- weak by its self
- strong when there are many
Hydrogen bond
polar molecule
one side is positive the other side is negative, or the molecule has one negative charge and one positive charge
What and how many elements make up water?
2 hydrogen and 1 oxygen
What charge does the hydrogen atom let off in water?
positive
