What is the mass number of the isotope lithium 7

Asked by maham237 @ 22/07/2021 in Physics viewed by 312 People

Answered by maham237 @ 22/07/2021

Lithium-7 is by far the most-common isotope, making up about 92.5 percent of all natural lithium. A lithium-7 atom contains three protons, four neutrons, and three electrons.

The atomic and mass numbers for four different atoms are given below. which two are isotopes?

Asked by maham237 @ 17/12/2020 in Chemistry viewed by 346 persons

The atomic and mass numbers for four different atoms are given below. Which two are isotopes of the same element? Atom Atomic Number Mass Number A 100 258 B 101 …

Infinite number of bodies each of mass 2kg

Asked by admin @ 29/08/2021 in Physics viewed by 272 persons

infinite number of bodies, each of mass 2 kg are situated on x-axis at distance 1m, 2m, 4m, 8m, respectively from the origin. The resulting gravitational potential due to this …

Atomic mass and atomic number of first 20 elements

Asked by admin @ 17/08/2021 in Math viewed by 509 persons

List of first 20 elements with atomic mass,symbol,atomic number,valency

Atomic number and mass number of first 20 elements

Asked by admin @ 13/08/2021 in Math viewed by 322 persons

List of first 20 elements with atomic mass,symbol,atomic number,valency

Isotopes of the same element have the same mass number

Asked by admin @ 04/12/2021 in Chemistry viewed by 441 persons

All isotopes of an element have the same number of neutrons. have the same number of protons. have the same atomic number. have the same mass number. have different chemical …

Uranium has two isotopes of masses 235 and 238 units

Asked by admin @ 04/08/2021 in Physics viewed by 318 persons

uranium has two isotopes of masses 235 and 238 units.If both are present in Uranium hexafluoride gas which would have the larger average speed?If atomic mass os fluorine is 19 …

How to find the number of electrons in an isotope

Asked by admin @ 02/08/2021 in Physics viewed by 288 persons

How to find the number of electrons in an isotope?

What is the mass of 12.82 moles of lithium (li) atoms?

Asked by maham237 @ 25/12/2020 in Chemistry viewed by 296 persons

What is the mass of 12.82 moles of lithium (li) atoms? 0.5414 g 1.847 g 88.98 g 535.7 g

A nucleus with mass number 220 initially at rest

Asked by admin @ 17/08/2021 in Physics viewed by 256 persons

A nucleus with mass number 220 initially at rest emits an α-particle. If the Q value of the reaction is 5.5 MeV, calculate the kinetic energy of the α-particle A) …

When a radioactive isotope releases an alpha particle, the atomic number of the atom is

Asked by maham237 @ 25/12/2020 in Chemistry viewed by 296 persons

When a radioactive isotope releases an alpha particle, the atomic number of the atom is (2 points) decreased by one. increased by one. decreased by two. increased by four.