2. Atoms & Elements

How many neutrons are present in the isotope lithium-8?

How many neutrons does the isotope nitrogen-15 have?

How many neutrons does a typical magnesium atom have if its atomic number is 12 and its most common isotope has a mass number of 24?

How many neutrons does lithium-8 have?

Which element is commonly used in the radiometric dating of fossils?

How many neutrons does a typical sodium (Na) atom have, given that its atomic number is 11 and its most common isotope has a mass number of 23?

Carbon-12 and carbon-13 are isotopes of carbon. Which of the following statements is correct?

Isotopes differ from each other in what way?

How many neutrons are in an atom of sodium (Na) with an atomic mass of 23?

How many neutrons are in an atom of sodium with a mass number of 23?

How many neutrons does a typical sodium atom have?

What are the atomic number and mass number for the carbon isotope with seven neutrons?

Which of the following best describes the difference between diploid and haploid cells?

Which of the following elements is the least abundant in the Earth's crust?

Which of the following statements about the d-block elements in the periodic table is false?