Week 6 Presentation - Part 2 (Ions, and Isotopes)

Multiple Choice

Why is it important for scientists to know the number of protons in an atom when studying elements?

• It helps identify the element and its properties

• It determines the color of the element

• It tells how many neutrons are present

• It shows the element's melting point

Fill in the Blank

In a neutral atom, the number of electrons is equal to the number of ___ .

Multiple Choice

Which element in the table has the greatest number of neutrons?

• Barium

• Copper

• Argon

• Potassium

Open Ended

Explain how isotopes of the same element are different from each other.

Dropdown

The mass number of this atom is ​

Select answer

and the atomic number of this atom is ​

Select answer

?

Multiple Select

Select all statements that are true about average atomic mass.

• It is a weighted average of an element's isotopes.

• It is listed as a decimal number on the periodic table.

• It is the same as the mass number.

• It is calculated using the number of protons and neutrons in a single atom.

Open Ended

How does the number of neutrons affect the mass number of an isotope?

Multiple Choice

Which isotope of carbon is the most abundant in nature?

• Carbon-12

• Carbon-13

• Carbon-14

• Carbon-11

Fill in the Blank

The isotope Carbon-13 has ___ neutrons.

Multiple Choice

What is the average atomic mass of lithium (Li) if it contains 7.5% Li-6 and 92.5% Li-7? (Use a calculator.)

• 6.93

• 6.50

• 7.00

• 6.75

Multiple Choice

Which of the following statements about ions is correct?

• A cation is formed by gaining electrons.

• An anion is formed by losing electrons.

• A cation is formed by losing electrons.

• An anion is formed by losing protons.

Multiple Choice

What happens to the charge of an atom when it gains one or more electrons?

• It becomes positively charged.

• It remains neutral.

• It becomes negatively charged.

• It becomes a cation.

Multiple Choice

Which part of the atomic symbol represents the number of protons in an atom?

• A (mass number)

• Z (atomic number)

• Q (charge)

• X (element symbol)

Multiple Select

Which of the following atomic symbols represents an ion?

• 14/6 C

• 12/6 C

• 24/12 Mg 2+

• 37/17 Cl

Open Ended

Explain how you can determine the number of neutrons in an atom using its atomic symbol.