2. Atoms & Elements

Rounded to the nearest whole number, how many protons are in an atom of krypton?

Oxygen has an atomic number of 8. What can you conclude from this fact?

On the periodic table, gold has the atomic number 79. This means that

How many neutrons are in an atom of copper? Round your answer to the nearest whole number.

An atom of the isotope ¹³³Cs contains how many protons (p), neutrons (n), and electrons (e)?

An aluminum isotope consists of 13 protons, 13 electrons, and 14 neutrons. Its mass number is ____.

The mass number of an atom is 15 and its atomic number is 7. the atom probably has...

What is the atomic mass of an atom that has 6 protons, 6 neutrons, and 6 electrons?

Using the periodic table, complete the table to describe each atom. Type in your answers.

Consider the following table showing symbols, the number of protons, electrons, and neutrons, and the mass number. Each column represents a neutral atom.

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Fill in the third column of this table.

Mercury is in the 80th position in the periodic table. how many protons does it have?

Which subatomic particles contribute to an atom's mass number but not its atomic number?

What type of atomic particles will you find inside of the nucleus of an atom?