Two particles with the same number of protons and different numbers of electrons outside the nucleus

aTwo different elements.

Wrong. The different types of elements are based on the number of protons.

so the number of protons is the same, it must be the same element;

bTwo particles with the same properties.

Wrong. Because by talking about particles, you can make molecules or ions, such as sodium atoms and sodium ions.

They both have ten protons and have different numbers of electrons outside the nucleus but also different properties;

c. One is cationic.

One is anion.

Wrong. No, only the two particles with the same number of electrons outside the nucleus and different proton numbers may be one is a cation and the other is an anion, such as oh- and h3o+;

dTwo particles of the same element but with different properties.

Right. For example, sodium atoms and sodium ions are the same element but have different properties.

If the number of protons is the same, then the ordinal number of the elements is the same, and it must be the same element.

The number of electrons outside the nucleus is different, and the number of charges is different, so the valency is not necessarily the same, and the properties are different.

C, Fe2+, Fe3+, so B can also be excluded

Two kinds of particles with the same number of plums and different numbers of protons in the nucleus may be: ()aAtoms and ions of two different elements (correct answer).

b.Atoms of two different elements.

c.Two ions of the same element.

d.Atomic and ionic segment beams of the same element.

aTwo different elements.

The different types of wrong elements are different according to the number of protons, so if the number of protons is the same, it must be the same element;

bTwo particles with the same properties.

The mistake is that by saying particles, you can make molecules or ions, such as sodium atoms and sodium ions, both of which have ten protons, and the number of electrons outside the nucleus is different, but the properties are also different;

One is cationic and the other is anionic.

False, only the two particles with the same number of electrons outside the nucleus and different protons may be one cation and the other anion, such as oh- and h3o+;

dTwo particles of the same element but with different properties.

For example, sodium atoms and sodium ions are the same element but have different properties.

c: In an atom, the number of protons = the number of electrons. The number of protons in the nucleus of an atom determines its chemical properties and what kind of chemical element it belongs to.

So exclude 1. Molecules are made of atoms, and if both molecules are made up of two atoms of the same number, then they have the same number of protons and electrons. For example, C3H6, a chemical short, can be two different molecules:

Cyclopropane and propylene. So 4 correct.

Ions: In chemical changes, charged particles formed by atoms or clusters of atoms after they gain and lose electrons are called ions. How to be electrified:

Gain or lose electrons, so the number of protons is not equal to the number of electrons. Whereas the molecule is not charged. If the number of protons of molecule A and ion B are the same, they are equal, 18, and the number of protons of molecule A is equal to the number of electrons, which is also equal to 18.

Whereas, the b ion is charged, so the number of electrons is not equal to the number of protons, so the number of electrons is not equal to 18. So exclude 3.

For example, atom: silicon and molecule: nitrogen N2, both have a proton number of 28 and an electron number of 28. So 5 correct.

Because the number of protons, the number of electrons outside the nucleus, and the number of charges carried by the particle are all the same, if they are in an atom, they are the same kind of particle, and if they are not in the same nucleus, of course, they must be particles of different substances in a nucleus, which means that the particle is in an atom, such as h2

O and Ne atoms, the number of protons, the number of electrons outside the nucleus, and the number of charges carried by the particles are all 10, so choose c

The relationship between relative atomic mass, number of protons, number of neutrons.

a. Because the proton number of the two particles is different, all atoms and ions that cannot be the same element, such as Na and Na+, have the same proton number, but the number of electrons outside the nucleus is different, so A is wrong;

b. Because the proton number of the two particles is different, it may be that the atoms and ions of different elements, such as NE and Na+, have different proton numbers, but the number of electrons outside the nucleus is equal, which is correct, so B is correct;

c. Because the proton number of the two particles is different, all atoms and ions that cannot be the same element, such as Na and Na+, have the same number of protons, but the number of electrons outside the nucleus is different, so C is correct;

d. Because the molecule is composed of atoms, and the ions are charged particles, there is a phenomenon of gain and loss of electrons outside the nucleus, and there may be an unequal number of protons in the nucleus and an equal total number of electrons outside the nucleus, such as: H2 O and OH-, so D is correct;

So choose A

Ba, two different ions are possible, e.g.: oh- and f- both contain 9 protons, 10 electrons, a correct;

b. It is impossible for a molecule and an ion to be equal, because for the molecule the number of protons and the number of electrons are equal, for the number of protons and the number of electrons is not equal for ions, so a molecule and an ion are either equal in number of protons or equal in number of electrons, and it is impossible for the number of protons and electrons to be equal, b is wrong;

c. A molecule and an atom are possible, for example: the water molecule and the neon atom both have 10 protons and 10 electrons, c is correct;

d. Two different molecules are possible, for example: H2O molecule and NH3 molecule both contain 10 protons and 10 electrons, D is correct

Therefore, C

a The number of protons and electrons is equal for molecules, and the number of protons and electrons is not equal for ions, so it cannot be a molecule and an ion, so a is wrong;

b If the number of protons of two particles = the number of electrons outside the nucleus, they may be different molecules, for example: H2O molecule and NH3 molecule both contain 10 protons and 10 electrons, so b is correct;

c One molecule and one atom are possible, e.g. the water molecule and the neon atom both have 10 protons and 10 electrons, so c is correct;

d If it is a particle formed by a single atom, the number of neutrons is not necessarily equal, and it may be two nuclides that are isotopes to each other, such as 12c and 14c, so d is correct, so a is chosen

a. In an atom, the number of protons in the nucleus is equal to the number of electrons outside the nucleus, so it is impossible for the atoms of different elements to have an unequal number of protons in the nucleus and the total number of electrons outside the nucleus; therefore a is correct;

b. The molecule is made up of atoms, which is similar to the analysis of option A and option B; Therefore b is correct;

c. Because the molecule is composed of atoms and the ions are charged particles, there is a phenomenon of gain and loss of electrons outside the nucleus, and there may be an unequal number of protons in the nucleus and an equal total number of electrons outside the nucleus, such as: H2O and Na+; Therefore c is incorrect;

d. Different ions, due to the gain and loss of electrons outside the nucleus, may also have unequal number of protons in the nucleus and equal total number of electrons outside the nucleus, such as: Na+ and F-; Therefore d is incorrect;

Therefore, ab is chosen