Which of these is the smallest particle to retain the properties of an element?

Which statement is supported by the atomic theory?

The current model of the atom has electrons in a cloud surrounding the nucleus. How does the electron cloud model differ from the Bohr model?

An atom’s mass number is 210 and its atomic number is 85. How many neutrons does the atom have?

Marcus wants to use two objects to compare the sizes of a proton and an electron. If he uses a basketball for a proton, which object would best represent an electron?

Calcium is an element. What is the smallest particle of calcium that has all the chemical properties of calcium?

An atom of the element gallium (Ga) has 31 protons and 39 neutrons. What is the atomic number of gallium?

An atom of lead has the atomic number 82 and a mass number of 207. How many neutrons does this atom of lead have?

What is the mass number of an atom that has 4 protons, 4 electrons, and 5 neutrons?

Atoms are the building blocks of all matter. Which of the following are the building blocks of atoms?

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