QUESTION 3: MATTER and MATERIALS K
3.1
Potassium is a group 1 element whose ion can be represented as
(a) How many protons does the above ion have?
(b) How many electrons does the lon have?
(c) Give the number of valence electrons in this ion.
(d) Give the mass number of the ion. 30
(e) Give the number of shells in this ion.
3.2
How many protons would a potassium atom whose lon is given in
Q.4.1 have?
(1)
(1)
3.3
Give a name which is generally used to refer to Rows in the periodic table.
3.4
Give a name which is generally used to refer to Columns in the periodic
(1)
table.
3.5
Oxygen is a gas and sulphur is a solid. Why is sulphur in the same group
as oxygen?
(2)​

Follow the steps provided in the simulation to add water to the graduated cylinder, select one of the three samples (copper, silver, or gold), set its mass to the values given in the statements below, and calculate its density. here is a summary of the steps required: add water by clicking and holding prepare a known volume of water button. until the desired volume of water has been added. if more than the desired volume is added, click the reset button. button and redo the procedure. a single click will add about 21.0 ml of water. to set the mass, click and hold weigh out metal button. until the desired amount of metal is added to the weighing pan. once the desired mass of the metal is added, release the button. transfer the metal to water and then click on calculate density button. to see how the density is calculated using water displacement to measure the volume of the solid. to save time you can approximate the initial volume of water to â±1 ml and the initial mass of the solid to â±1 g. for example, if you are asked to add 23 ml of water, add between 22 ml and 24 ml. which metals in each of the following sets will have equal density? check all that apply.

Aradio signal from a gps satellite take only about 0.067 seconds to reach a gps reciever. if the speed of light is about 300,000km/s, then approximately how far away is the reciever from from the satellite?

We are hoping to create 5.72 grams of glucose. the plant was given 4.75 liters of co2 and 2.81 g of h20. which reactant was the limiting reagent? how much excess mass did we have of the other reactant?