Cho các nguyên tử có kí hiệu sau: 11 23 ; 17 35
a) Xác định số khối, số proton, số nơtron, số e của nguyên tử các nguyên tố trên
b) Viết cấu hình e nguyên tử, xác định số electron ở mỗi lớp, là kim loại , phi kim hay khí
hiếm

Avariable that is not being directly tested during an experiment should be changed varied experimented controlled

How many protons, electrons, and neutrons are in each of the following isotopes? a. zirconium-90 b. palladium-108 c. bromine-81 d. antimony-123

The picture represents the process that produces most of the energy used by living organisms on earth. which process is represented in the picture? a) the magnetic attraction between two hydrogen nuclei. b) the fusion of hydrogen nuclei to produce a helium nucleus in the core of the sun. c) the fission of hydrogen nuclei to produce a helium nucleus in the core of the sun. d) the chemical reaction between hydrogen nuclei to produce a helium nucleus in earth's atmosphere.