Help solve a few chemistry problems, help solve a chemistry problem

1。The most ** oxide hydration is the most alkaline – cesium (cs).

The law of metallicity is to decrease from left to right, and increase from top to bottom, the radioactive element francium is generally not considered, the stronger the metallicity, the stronger the alkalinity of the hydrate of the most ** oxide. Therefore, it is CS, the most ** oxide is CS2O, and the hydrate is CSOH

2。The most ** oxide hydrate is amphoteric - Al(OH)3

The common amphoteric compounds are Al2O3 and Al(OH)3, and the elemental element of the amphoteric is Al, so it is Al(OH)3

3。There are three elements, x, y, and z, and the outermost electrons of the x, y, and y atoms have the same number of electrons; The number of electron shells of y,z atoms is the same; X and Y can form two compounds, Yx2 and Yx3, the number of protons in the nucleus of Y is twice that of X, X and Z can form compounds, and what elements are Y and Z.

X and Z can form compound Z2X5, indicating that Z is +5 valence and X is -2 valence.

X and Y can form two compounds, Yx2 and Yx3, it is known that X shows -2 valence, indicating that Y shows positive valence, and there are two valence states of +4 and +6, the outermost electron number of X, Y atoms is the same, indicating that X and Y are in the same main group, -2 valence is the sixth main group, there are two elements O and S, compared to Yx2 and Yx3, so it is SO2 and SO3, Y is S (element 16, 16 8=2), X is O (element 8), X and Z can form compound Z2X5, indicating that Z may be N or P, z and y have the same number of electron shells, indicating the same period, both are of the third period, so z is p

In summary: x: oxygen, o

y: sulfur, sz: phosphorus, p

CSOH, cesium.

Al, Aluminum is composed of yx2, yx3, and x, y of the same family, and it is known that x,o oxygen y,s sulfur.

z, p phosphorus don't understand hi me.

Relatively simple and easy to understand method).

Alkalinity is determined by non-metallic properties, so the strongest alkalinity should be the strongest non-metallic metal, so CS is the strongest metal, and FR radioactive metals are no longer considered.

Aluminum is an amphoteric metal, so oxides are also amphoterics, in fact, there are long-term elements such as GA, GE, and so on, which are generally regarded as unlearned.

The outermost electron number of x,y atoms is the same, so x,y is the same main group, and can form yx3,yx2, so there are 2,3 times the positive valence state, so x can be -1,-2 valence, because z2x5 is formed with z, it can be inferred that x is an even valence -2, we can know that x is oxygen, y is sulfur, because the number of electron shells of y,z atoms is the same, so y,z are the same period, so z is phosphorus.

It's detailed enough, and I gave up the first priority.

CS (FR unstable existence) has the strongest metallicity in the first main group. Metallic increase from top to bottom.

al al(OH)3 into both sexes.

x：o y:s z:p

1, CSOH, cesium.

2,al2o3

3。There are three elements, x, y, and z, and the outermost electrons of the x, y, and y atoms have the same number of electrons;

Description x and y are in the same main family.

The number of electron shells of y,z atoms is the same;

Y and Z are in the same cycle.

X and Y can form two compounds, Yx2 and Yx3, the number of protons in the nucleus of Y is twice that of X, and X and Z can form compound Z2X5

Z2X5 can be formed, indicating that X is not 1 valence, it may be 2 or 3 valence, but it can form Yx3, X can only be 2 valence, which is the 6th main group element, X is oxygen, Y is sulfur, and Z is phosphorus.

The first type: a C atom with an H atom, a benzene ring, and two ethyl groups.

The second type: a c atom with an H atom, a benzene ring, a methyl group, and a propyl group.

The third type: a C atom with an H atom, two methyl groups, and a benzene ring (there are two -CH2- between the benzene ring and the C atom).

Fourth: a c atom with an h atom, a benzene ring (there is a -ch2- between the benzene ring and the c atom), a methyl group, and an ethyl group.