( 1)
Monovalent potassium sodium silver hydrogen chloride.
Divalent calcium, barium, magnesium and zinc oxide
Tetrasilicon pentavalent phosphorus trialuminum
It is not difficult to change the price of nitrogen.
23 iron 24 carbon
Sulfur has negative two positive four six manganese * * * seven.
The bivalents of copper and mercury are the most common.
Hydroxide is negative monovalent.
Ammonium is monovalent.
Nitrate is negative monovalent.
Sulfate negative divalent
Carbonate negative divalent
(2)
Monovalent potassium sodium hydrogen chloride silver, bivalent barium calcium magnesium zinc oxide. (All the prices are negative at the beginning, and the rest are positive)
One, two, copper, mercury, two, three iron. ("Asia" means low price in Chinese)
Trivalent aluminum, remember clearly.
Simple substance is always zero-valent.
The rest is the majority price, please work out the equation.
(3)
Monovalent potassium, sodium, hydrogen chloride, silver, divalent calcium, magnesium, oxygen, barium and zinc, aluminum, silicon and pentavalent phosphorus.
Two four six sulfur two four carbon, two three four five is nitrogen.
Iron is two or three, copper is one, and the zero price of a single substance should be remembered.
(4)
Potassium, sodium, hydrogen and silver are monovalent,
Calcium, magnesium, barium and zinc are bivalent.
Fuwan was negative for iodine,
Keywords copper, mercury, positive aluminum, positive three,
Iron has positive two and positive three.
————————————————————————————
Univalent sodium, potassium, silver and hydrogen (which wedding party)
Bivalent magnesium, calcium, zinc and barium (no new coating)
Remember three aluminum and four silicon.
————————————————————————————
One, two copper, two, three iron, two, four carbon.
Remember everything about sulfur 246.
(negative price) chlorine-sulfur-disulfide is the most common.
————————————————————————————
Monovalent ammonium, potassium, sodium, silver and hydrogen
Bivalent copper, magnesium, calcium, barium and zinc
Iron positive two (positive) three aluminum positive three
Chlorine (negative) monovalent oxygen negative two
The negative element of princess Jin Zhong is zero (metal positive and nonmetal negative)
There are four more to remember.
Negative monohydroxide (free radical) nitrate
Negative dicarbonate (free radical) sulfate
————————————————————————————
Nitrogen, potassium, sodium, ammonium and silver.
N- dicalcium magnesium barium copper zinc
Negative monofluoro-chlorine negative dioxygen
Three kinds of aluminum, four kinds of iron, five kinds of nitrogen and phosphorus.
————————————————————————————
Monovalent potassium hydrogen, sodium silver, fluorine and chlorine
There are also hydroxyl nitric acid and ammonium.
Bivalent calcium magnesium barium zinc and oxygen sulfur
Sulfuric acid and carbonic acid.
Copper, mercury, iron, iron, two or three
————————————————————————————
Negative hydroxyl mononitrate
Negative disulfate carbonate
Negative three, remember phosphate
The positive valence is ammonium.
————————————————————————————
Potassium, sodium, silver and hydrogen are monovalent, and Fuwan iodine is monovalent;
Magnesium, calcium, zinc and barium are positive divalent, and oxygen is usually negative divalent;
Nitrogen is plus or minus 3245, sulfur is minus 2+46,
23 iron, 24 carbon, 3 aluminum and 4 silicon pentavalent phosphorus;
157 valence element chlorine, 246 sulfur manganese 47;
The bivalence of copper and mercury is the most common, and the valence of simple substance is zero.
————————————————————————————
Monovalent potassium sodium silver hydrogen
Bivalent calcium magnesium barium zinc
Trivalent aluminum, tetravalent silicon
One or two copper, two or three iron
————————————————————————————
Potassium sodium hydrogen silver monovalent hydrogen
Bivalent oxygen calcium magnesium barium copper zinc
Aluminum, silicon, nitrogen and phosphorus.
It is not difficult to talk about price changes.
23 iron, 24 carbon and 246 sulfur are all complete.
157 chlorine should be remembered clearly.
————————————————————————————
Monovalent potassium sodium silver hydrogen chloride
Divalent calcium, barium, magnesium and zinc oxide
Aluminum has a valence of n-trialkyl and negative two.
Remember the truth of the above price.
Copper one, two, iron two, three.
Remember all the knowledge about carbon and silicon.
Sulfur is negative, two is positive and four is six.
Negative tri-n-penta-N-P
The price of chlorine is usually minus one.
There is also a positive price 157.
The positive valence of manganese is 246.
The highest price is also seven.
The valence of simple substance is 0.
————————————————————————————
Monovalent potassium sodium silver hydrogen fluoride
Divalent calcium, barium, magnesium and zinc oxide
Three aluminum, four silicon and three phosphorus.
One, two copper, mercury, four, seven manganese
23 iron 24 carbon
246 sulfur, 35 nitrogen
Chlorine 157 is very common.
Simple materials is zero and will never change.
————————————————————————————
Potassium, sodium, hydrogen and silver are monovalent.
Calcium magnesium barium zinc positive divalent
Al _ 3 Si _ 4 O _ 2 MINUS two
Fuwan iodine is always negative.
————————————————————————————
Monovalent potassium sodium silver hydrochloride
Divalent calcium, barium, magnesium and zinc oxide
Tetrasilicon pentavalent phosphorus trialuminum
23 iron 24 carbon
246 sulfur is complete.
The bivalents of copper and mercury are the most common.
Remember the atomic group clearly.
The positive unit price is ammonium.
Negative monovalent nitrate hydroxide
Negative bivalent sulfate carbonate
And negative trivalent phosphate
————————————————————————————
Valence, please remember accurately,
Monovalent potassium sodium silver hydrogen chloride,
Bivalent calcium, barium, magnesium and zinc oxide,
Aluminum, silicon, nitrogen and phosphorus.
It is not difficult to talk about price changes.
23 iron, 24 carbon,
246 sulfur completed,
Copper and mercury are the most common divalent elements.
——————————————————————————
Monovalent potassium, sodium, hydrogen and silver
Bivalent calcium magnesium barium zinc
Trivalent metal element aluminum
157 valence element chlorine
Three, five, phosphorus, twenty-four carbon
245 is elemental nitrogen.
One or two copper, two or three iron
2467 special manganese
Potassium sodium silver monochlorohydrogen
Calcium, barium, magnesium and zinc oxide
Tetrasilicon pentavalent phosphorus trialuminum
23 iron 24 carbon
246 sulfur is complete.
The bivalents of copper and mercury are the most common.
Don't forget everything is zero.
————————————————————————————
The monovalent metals silver, sodium and potassium and cuprous mercury are monovalent,
Bivalent metals such as zinc, barium and copper, as well as calcium, magnesium and ferrous mercury,
Iodine in Fuwan often shows one, sometimes three, five, seven,
Hydrogen is monovalent, oxygen is divalent, iron is trivalent, and aluminum is trivalent, remember,
Sulfur is bivalent and hexavalent, while nitrogen and phosphorus are conventional.
————————————————————————————
Sodium, hydrogen, potassium and silver are monovalent, while calcium, barium, magnesium and zinc are monovalent.
Copper, iron, sulfur and carbon,
Three aluminum, four silicon, three five phosphorus, and manganese, chlorine and nitrogen.
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 / kloc-0/ 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
Potassium, sodium, silver, ammonium, hydrogen and calcium, magnesium, barium and zinc are two kinds.
Fluorine, bromine, hydrogen, oxygen and nitric acid are negative, and sulfuric acid oxycarbonic acid is negative.
Three is aluminum, four is silicon, one or two copper, two or three iron,
Negative three, two three four five nitrogen, chlorine negative one one one five seven.
Manganese has 24 and 67,24 carbons,
Negative 246 is the valence of sulfur, and phosphorus has negative 33 and 5.
The valence is zero, and the elemental substance is zero.