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What will be produced from the reaction of hydrogen and chlorine?
hydrogen chloride
Why are group I metals more reactive going down the group?
Before the elements react with another element, it forms a cation (positive ion) by losing the electrons in its outermost shell. Larger atoms lose electrons more easily. The electrostatic attraction (attraction of electrons and protons in the nucleus) gets weaker because the distance is further.
What will be produced by the reaction of iodine and hydrogen?
I2 + H2 ->
hydrogen iodide
I2 + H2 -> 2HI
Helium (He) is an example of noble gas. Mention 3 other noble gases!
N, Ar, Kr, Xe, Rn
What will be produced by the reaction of chlorine and potassium bromide?
Cl2 + KBr -> ?
Cl2 + 2KBr -> 2KCl + Br2
State the formula of the metal ion in FeCl2 and in FeCl3!
FeCl2 = 2+
FeCl3 = 3+
The elements in Group VII of the periodic table are called halogens. They form salts called halides. Write a symbol equation for the salt formed when calcium reacts with chlorine!
2Ca + Cl2 -> 2CaCl
1. What will be the charge on a rubidium ion?
2. What are the chemical formulas of:
i) Rubidium iodide
ii) Rubidium fluoride
iii) Rubidium hydroxide
1. +1
2. a) RbI
b) RbF
c) RbOH
What will be produced by the reaction of potassium and iodine?
K + I2 -> ?
potassium iodide
2K + I2 -> 2KI
What will be produced by the reaction of caesium with water?
Cs + H2O -> ?
caesium hydroxide + hydrogen
2Cs + 2H2O -> 2CsOH + H2
K + H2O --> ?
Potassium hydroxide + hydrogen
2K + 2H2O --> 2KOH + H2
Why do some transition element compounds have numbers in their names (i.e. vanadium (V) oxide, iron (III) oxide)?
Transition elements can form more than one compound.
Explain 3 properties of alkali metals!
Rubidium (Rb) is in Group I of the periodic table, lying directly beneath potassium (K). Predict the physical properties of rubidium, to include:
a. its hardness
b. its electrical conductivity
c. its melting and boiling point
a. soft
b. good electrical conductivity
c. low melting and boiling point
Hydrogen was placed at the top of Group 1 in the early version of the periodic table. The modern periodic table does not show hydrogen in Group 1.
Why is hydrogen not located in Group I of modern periodic table?
Hydrogen is a gas/non-metal.
What will be produced by the reaction of rubidium and bromine?
Rb + Br2 -> ?
rubidium bromide
2Rb + Br2 -> 2RbBr
Which of the following is the most reactive?
a. Neon (Ne)
b. Argon (Ar)
c. Xenon (Xe)
d. Helium (He)
d. Helium (He)
Cr2O3 = chromium (?) oxide
Cr2O3 = chromium (III) oxide
Why does iodine not react with sodium bromide solution?
Iodine doesn't react with sodium bromide because it is less reactive than bromine.
Why is noble gas called 'noble' gas?
They are called noble gases because they do not react with anything in general. They're also known as inert gases for this reason.
What will be produced by the reaction of bromine and sodium iodide?
Br2 + 2NaI -> ?
sodium bromide and iodine
2NaBr + I2
What will be produced from the reaction of:
a) chlorine + sodium bromide
b) bromine + potassium iodide
a) Sodium chloride + bromine
b) potassium bromide + iodine
Mention (in order) the elements of:
a) Group I (metals)
b) Group II (metals)
c) Group III (metals)
d) Group VII (non-metals)
e) Group 0 (non-metals)
a) Group I = Li, Na, K, Rb, Cs, Fr
b) Group II = Be, Mg, Ca, Sr, Ba, Ra
c) Group III = B, Al, Ga, In, Tl
d) Group VII = F, Cl, Br, I, At
e) Group 0 = He, Ne, Ar, Xe, Ra, Og
CuCl = copper (?) chloride
CuCl = copper (I) chloride
Why is lithium less reactive than potassium?
The tendency to lose electrons is greater in potassium than that in lithium. This is because in lithium the valence electrons are closer to the nucleus therefore the attractive forces between nucleus and valence electrons are very strong.