P.S. - chapter 4

Which statement about the nucleus is correct?

The first person who suggested matter was made up of atoms was this Greek philosopher.

Which statement about the modern model of the atom is not true?

According to the new model of the atom, electrons behave like

According to modern atomic theory, it is nearly impossible to determine an electron's exact

Whose model determined that an atom's positive charge is concentrated in the atom's center?

Which of these statements is not part of Dalton's atomic theory?

Which of the following statements not true?

Who determined that atoms could be divided?

Which of the following statements is not true?

What is an atom's nucleus made of?

Isotopes of the same element have the same atomic number, but different ______

Which statement is true according to Dalton's theory?

Valence electrons determine an atom's

Dalton's atomic theory was accepted because

The charge of an atom is

According to modern atomic theory, electrons are found on sublevels called _______ within levels of the electron cloud

An electron jumps to a new energy level when

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

Two different isotopes of an element have different

In _____ atomic model, negative electrons orbit the positively charged nucleus.

the mass in grams of one mole of a substance

Avagadro's number is defined as the number of particles in

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

How much effect do commonly found isotopes have on the average atomic mass of an element?

Unlike the modern model of the atom, Bohr's model states that

An atom's mass number equals the number of

A mole is an SI base unit that describes the

Avogadro's number is useful for

The SI base unit used for counting large numbers of small particles