Atoms
More Atoms and the Periodic Table
Ions and Bonding
Chemical Equations
Random questions
100
What is the symbol for Potassium?
K
100
Are groups horizontal or vertical on the periodic table?
Vertical
100
What is an ion?
An atom or molecule with either a positive or negative charge because it has an unequal number of electrons
100
In a chemical equation which side is the reactants and which side are the products?
Reactants left and Products right
100
Is adamantium a real metal?
No
200
What is valence electrons?
The electrons in the outer shell
200
How many neutrons are there in Chlorine
18
200
Define Cation
An ion with a positive electrical charge
200
What is the Law of conservation of mass?
Mass is neither created or destroyed during a chemical reaction
200
What letter does not appear on the periodic table?
J
300
What is an Isotope?
Forms of the same element but with different numbers of neutrons in there nuclei
300
What is the name for group 2?
Alkali Earth metals
300
What is the name when a metal and non metal bond
Ionic bonding
300
Write the balanced equation for H + S --> H2S
2H + S --> H2S
300
Why is lead Pb on the periodic table?
It comes from Plumbum, the ancient laten word for metal
400
Draw and number? the electron shell of Magnesium
2,8,2
400
What is half life?
The time needed for half of a radioactive sample to decay
400
Is F- a cation or anion and draw a diagram?
Anion
400
Balance N2 + H2 --> NH3
N2 + 3H2 --> 2NH3
400
What element makes bananas slightly radioactive?
Potassium
500
Write the atomic symbol for Argon (include mass and atomic wieght)
39.94818Ar
500
3 Key features of non-metals?
- poor conductors of heat and electricity
- tend to gain electrons in chemical reactions
- weak and brittle
500
2 similarities and 2 differences between ionic and covalent bonding
- both types of bonding
- both involve valance electrons
- covalent is only between non metal ions and iconic is between metal and non-metal
- ionic transfers electrons where covalent shares electrons
500
Balance CO2 + H2O --> C6H12O6 + O2
6CO2 + 6H2O --> C6H12O6 + 6O2
500
How many synthetic elements are there?
24