Atoms & Isotopes

Front

What is the atomic number of Neon, Ne?

Back

10

Front

Composition of a neutral atom of the isotope ²⁶₁₂Mg

Back

12 protons, 14 neutrons, 12 electrons

Front

Which of the following statements regarding subatomic particles is incorrect? Protons are positively charged particles and neutrons have no charge. The relative mass of the proton, electron and neutron the same. In a neutral atom the number of protons equals the number of electrons. Isotopes of an element have the same number of protons but a different number of neutrons.

Back

The relative mass of the proton, electron and neutron the same.

Front

When is an atom electrically neutral?

Back

protons and electrons are the same

Front

Isotopes of the same element have the same number of

Back

protons

Front

How many neutrons does iron-60 (atomic number 26) have?

Back

34

Front

Which isotope of lead is likely to be the most abundant given the isotopes: lead-204, lead-206, lead-207, and lead-208, with an average atomic mass of 207.2?

Back

lead-207

Front

Which of the following particle pairs has approximately the same mass? Options: protons and neutrons, protons and electrons, neutrons and electrons, protons, neutrons and electrons

Back

protons and neutrons

Front

The element, antimony (Sb) has two major isotopes of similar abundances, both around 50%. The atomic mass of antimony is reported on the periodic table as 121.76. Choose the most likely set of mass numbers for these two antimony isotopes.

Back

Antimony-121 and Antimony-123

Front

A carbon isotope consists of 6 protons, 6 electrons and 8 neutrons. What is the mass number for this isotope?

Back

14