Atoms have no electric charge because they

A subatomic particle that has a negative charged is called

Which of the following statements is not true?

What is an atom's nucleus made of?

The charge of an atom is

An iron atom has an atomic mass of 56. Its atomic number is 26. How many neutrons does the iron atom have?

An element's atomic number is equal to its number of

Two different isotopes of an element have different

What is the mass number of an element that has 19 protons, 19 electrons, and 20 neutrons?

Oxygen's atomic number is 8. This means that an oxygen atom has

Which statement about an element's average atomic mass is correct?

An atom's mass number equals the number of

The nucleus of an atom consists of 8 protons and 6 neutrons. The total number of electrons present in a neutral atom of this element is

Which of the following particles has the least mass?

The cathode ray tube was instrumental in the discovery of

The gold foil experiment contributed to the discovery that:

A sample of element X contains 90% X-35 atoms, 8.0% X-37 atoms, and 2% X-38 atoms. The average atomic mass will be closest to which value?

The atomic mass of an element is defined as the weighted average mass of that element's

Compared to the entire atom, the nucleus of the atom is

Which symbols represent atoms that are isotopes?

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