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;
19 Cards in this Set
- Front
- Back
|
What is an atom composed of?
|
Protons, neautrons and electrons
|
|
|
An atom is composed of 3 important things, but what are each of there charges?
|
Proton = +1
Neautron = 0 Electron = -1 |
|
|
Electrons _____ One another.
|
Repel +-+
|
|
|
Protons ______ One another.
|
Repel. - - -
|
|
|
Protons & Electrons _____ one another.
|
Attract + + -
|
|
|
What is an atomic number?
|
The number of protons in each atom of an element.(bottom)
|
|
|
What is a mass number?
|
The total number of protons and neutrons in an atom. (top)
|
|
|
What is an isotope?
|
Atoms with identical atomic numbers (Z) but different mass numbers (A) are called isotopes. Protium, deuterium, and tritium are three isotopes of the element hydrogen.
|
|
|
6
C < explain each. 12.011 |
6 = Atomic number
C=Atom symbol 12.011 = Atomic weight |
|
|
Where are the alkali metals on the peridic table?
|
1 - Li to Fr
|
|
|
Name special charastics of alkali metals?
|
Shiny, Soft & low melting points.
All react rapidly with water |
|
|
Where are the alkaline earth metals?
|
2 - Be to Ra
|
|
|
What characterstics do earth metals have?
|
Lustrous, Silvery metal.
React with 02 but less reactive to water than the alkaline metals. |
|
|
Where are the halogens?
|
17 - F to At
|
|
|
What characterstics do halogens have?
|
Colurful & corrosive non metals.
|
|
|
Where would u find the noble gases?
|
18 - He to Rn
|
|
|
What characterstics do noble gases have?
|
Colurless gases.
Very low chemical reactivity. |
|
|
What is the electronic structure of an atom?
|
shell 1 2 3 4
s s,p s,p,d s,p,d,f |
|
|
Total electrons in each shell?
|
2, 8,18 and 32
|
