Understanding Atomic Numbers and Elements

The video tutorial explains how to determine which element has 30 protons by using the periodic table. It begins by defining the atomic number as the number of protons in an element. The tutorial then guides viewers on how to locate the atomic number on the periodic table, noting that it is the whole number above the element symbol. As elements are arranged in order of increasing atomic number, each element has one more proton than the previous one. The video concludes by identifying zinc, with the symbol Zn, as the element with 30 protons, corresponding to atomic number 30.

What is the first step in identifying an element with a specific number of protons?

• Check the atomic mass.

• Count the electrons.

• Look at the element's color.

• Refer to the periodic table.

What does the atomic number of an element represent?

• The number of neutrons.

• The number of protons.

• The number of electrons.

• The element's weight.

How does the atomic number change as you move across a period on the periodic table?

• It doubles.

• It increases by one.

• It remains the same.

• It decreases by one.

Which element has an atomic number of 30?

• Iron (Fe)

• Nickel (Ni)

• Zinc (Zn)

• Copper (Cu)

What is the symbol for the element with 30 protons?

• Zn

• Xn

• Xe

• Zr