Calculating Isotope Abundance for Chlorine Isotopes

Play an AI-generated podcast conversation about this lesson

What is the formula for calculating the atomic weight using isotope abundance?

[(Percentage of isotopes)(atomic mass of 1st isotope)] + [(percentage of isotopes)(atomic mass of 2nd isotope)] (correct)

[(Mass number of isotopes)(atomic mass of 1st isotope)] + [(mass number of isotopes)(atomic mass of 2nd isotope)]

[(Number of protons)(atomic mass)] + [(Number of neutrons)(atomic mass)]

[(Atomic weight)(mass number of isotopes)] + [(Atomic number)(percentage of isotopes)]

In the example provided, what is the abundance percentage of Chlorine-37?

24% (correct)

54%

76%

46%

How many protons are present in Chlorine-35 isotope?

35

17 (correct)

19

18

Which law states that the physical and chemical properties of elements are a periodic function of their atomic masses?

Periodic Law Signup and view all the answers

What does the atomic number represent in an element's properties?

Number of protons Signup and view all the answers

Which term refers to the outermost electrons in an element's electronic configuration?

Valence electrons Signup and view all the answers

Which atomic property describes the ability of an atom to attract electrons in a chemical bond?

Electronegativity Signup and view all the answers

In which direction does electronegativity trend across a period in the periodic table?

Increases from left to right Signup and view all the answers

What is the energy needed to remove an atom's most loosely held electron called?

Ionization energy Signup and view all the answers

Which element type usually attracts electrons and is considered electronegative?

Non-metal element Signup and view all the answers

What happens to ionization energy as you move from top to bottom in a group on the periodic table?

Increases Signup and view all the answers

Which atomic property measures the energy change when an atom gains a single electron and forms a negative ion?

Electron affinity Signup and view all the answers

What does the Law of Definite Proportions state?

A compound always contains the same elements in definite proportions by mass regardless of the sample size. Signup and view all the answers

Which statement describes the Law of Multiple Proportions?

When two elements form more than one compound, the ratios of the masses of the second element can be expressed as small whole numbers. Signup and view all the answers

What defines the atomic number of an atom?

The total number of protons in the nucleus. Signup and view all the answers

What is true about isotopes?

Isotopes have different mass numbers but same atomic numbers. Signup and view all the answers

If two elements form compounds with varying ratios of their masses, which law is being illustrated?

Law of Multiple Proportions Signup and view all the answers

In an isotope, if the atomic number is 12, what can we say for certain about the number of protons?

There are 12 protons. Signup and view all the answers