11 combined review chemistry | Baamboozle - Baamboozle

English 33 Public

review for January mocks

Study Slideshow

Which subatomic particle has the lowest mass?

electron

5

For an atom of atomic number 137, how many electrons does it contain?

137

10

Some metal objects are electroplated. State two reasons for electroplating a metal object.

Any two • improves the appearance/ shiny (1) • improves resistance to corrosion/ does not corrode/ prevents reaction with prevents oxi; Any two from: • improve

25

Write the formula for magnesium phosphide

Mg3P2

15

What is the name of this compound?

sodium dihydrogen phosphate monohydrate

25

What is the electron configuration of nitrogen (atomic #7)

2.5

10

what is the word equation for the following

sodium hydroxide + hydrochloric acid sodium chloride and water

10

Give an example of an alkali metal

Either: lithium, sodium, potassium, rubidium, cesium or francium (Li, Na, K, Rb, Cs, Fr)

5

An atom of element X has an atomic number of 119 and a mass number of 319. How many neutrons does it have?

200

15

An atom of element X has an atomic number of 119 and a mass number of 319. How many electrons does it have?

119

15

An atom of element X has an atomic number of 119 and a mass number of 319. How many protons does it have?

119

15

Explain why relative atomic masses of some elements are whole numbers, but those of some other elements, for example chlorine, are not.

Some elements have different isotopes, so their relative atomic masses are a weighted mean value.

20

Throughout the experiment the volume of hydrogen and the volume of oxygen are measured at two-minute intervals. Describe what the results show about the volumes of hydrogen and of oxygen produced in this experiment.

A description to include • volumes going up: (oxygen/ hydrogen/ gas) increase (with time) / volume (directly) proportional to time (1) • quantitative comparing

25

) 8.000 g of CaCO3 was heated strongly for about 10 minutes. 6.213 g of solid remained. Calculate the mass of carbon dioxide gas given off.

8.000- 6.213 = (1.787) (g)

15

Calculate the relative formula mass of calcium carbonate, CaCO3. (relative atomic masses: C = 12, O = 16, Ca = 40)

100

15

Which two elements on the periodic table are liquids at room temperature?

bromine and mercury

20