Chemistry Ch 4 Test Rev

The atomic number of an element is the total number of which particles in the nucleus?

All atoms are

What is the relative mass of an electron?

Which of the following is the symbol, the # of protons, and the # of electrons given correctly?

The smallest particle of an element that retains the properties of that element is a(n) ____.

What does the number 84 in the name krypton-84 represent?

Why did J. J. Thomson reason that electrons must be a part of the atoms of all elements?

the central part of an atom, containing protons and neutrons

a negatively charged subatomic particle

Which of the following statements is true?

The atomic mass of an element is the ____.

The mass number of an element is equal to ____.

Which of the following is correct concerning subatomic particles?

All atoms of the same element have the same ____.

The sum of the protons and neutrons in an atom equals the ____.

Which two of the following symbols represent isotopes of the same element?

What unit is used to measure weighted average atomic mass?

Which of the following sets of symbols represents isotopes of the same element?

The nucleus of an atom is

Which model of the atom is thought to be true?

the total number of protons and neutrons in the nucleus of an atom

the smallest particle of an element that retains the properties of that element

the weighted average of the masses of the isotopes of an element

How is the number of neutrons in the nucleus of an atom calculated?

the number of protons in the nucleus of an element

Who conducted experiments to determine the quantity of charge carried by an electron?

The particles that are found in the nucleus of an atom are ____.

Which of the following equals one atomic mass unit?

Isotopes of the same element have different

one-twelfth the mass of a carbon atom having six protons and six neutrons

He lived from 460 B.C.–370 B.C. and was the first to suggest the idea of atoms?

An element has an atomic # of 76 . The # of protons & electrons in a neutral atom is?

Which discovery did J. J. Thomson make that improved upon Dalton's atomic theory?

a subatomic particle with no charge

In which of the following is the number of neutrons correctly represented?

Isotopes of the same element have different

Which of the following is true about subatomic particles?

atoms with the same # of protons, but different #s of neutrons in the nucleus of an atom

a positively charged subatomic particle

How do the isotopes hydrogen-1 and hydrogen-2 differ?

How many protons, electrons, & neutrons does an atom with atomic # 50 and mass # 125 contain?

Using the periodic table, determine the number of neutrons in ¹⁶O.

The average atomic mass of an element depends upon the

Dalton's atomic theory included which idea?