Latihan Ilmu Kimia Kelas X

Which of the following is not a role of chemistry in the fields of food and agriculture?

• Conducting research on the genetic composition of drought-resistant plants.

• Researching environmentally friendly preservatives and food additives.

• Conducting research on the nutritional content of alternative food sources.

• Conducting research on pesticides and their impact on the environment.

• Engineering agricultural equipment for production process efficiency.

The following statement about atoms according to Niels Bohr is correct...

• As electrons orbit the nucleus, their energy decreases according to Maxwell's theory.

• In a stationary state, electrons orbit the nucleus, and their energy remains constant as long as they do not change orbits.

• If an electron absorbs energy, its orbit will shift to a closer orbit to the nucleus.

• Electrons move in electron shells that have specific energy levels. The further out the electron shell, the lower the energy.

• Each electron shell can accommodate an arbitrary number of electrons as long as they are not attracted to the nucleus.

Among the following statements, the particles that are fundamental components of atoms are indicated by the number...

• (1) Proton with a negative charge

• (2) Neutron with no charge

• (3) Alpha particles with a positive charge

• (4) Electron with a negative charge.

The statement regarding the ion with the symbol Cr24 52 2+ is correct, except...

• Chromium has an atomic number of 24 and a mass of 52.

• The number of protons is different from the number of electrons.

• Chromium releases 3 electrons to form a cation.

• The number of neutrons is less than the number of protons.

• It has the same number of electrons as Sc21 45.

Atom S16 32 when forming ion S2- will have...

• 18 protons in the nucleus

• 17 electrons around the nucleus

• 31 neutrons around the nucleus

• 18 electrons in the nucleus

• 18 electrons around the nucleus

Refer to the following data table!

• P and Q

• Q and R

• S and T

• R and S

• P and T

A nuclide X has 10 protons and 12 neutrons, while nuclide Y has a mass number of 23 and an atomic number of 11. The two nuclides can be referred to as...

• Isotopes

• Isotones

• Isobars

• Isomers

• Isoelectrons

Refer to the table below!

• P

• Q

• R

• S

• T

Refer to the data in the table below!

• P and Q are 6 and 5 respectively

• Particle 1 and 2 are isotones

• U and V are 28 and 24 respectively

• Particles 3 and 4 are isotopes

• Particle 5 is a +2 charged ion

From the five types of elements in b...