Physical Science Chapter 3: The Atom

__________________ theorized about tiny, negatively-charged particles in a positive gel-like substance.

What would we call Ca²⁺?

The branch of physics that explores the behavior of matter and energy at the atomic and subatomic level

Which is the smallest part of an atom?

Which of the three subatomic particles is positive?

Which was NOT an idea from Democritus?

What is the atomic mass of Fluorine?

The number of protons in an atom is called the ______________.

A neutral atom of He has 2 protons. How many electrons does it have?

The flame test experiment is best explained using _________ model.

Which was NOT part of John Dalton's model?

The ancient Greek who said that matter is continuous (not made of discrete particles) was named___________

An atom of an element that has a different number of neutrons compared with other atoms of that element.

The weighted average of all the isotopes of a particular atom is called the ____________

A calcium atom has 20 protons and 18 electrons. What is its charge?

____________ realized that each element produces an emission spectrum that produced only certain wavelengths of light.

The following is called

The current atomic model uses orbitals rather than neat orbits of electrons around the nucleus.

What did Ernest Rutherford's experiments NOT show?

What is the current atomic model?

If carbon has an atomic number of 6, how many neutrons are in C-13?

An ion with a positive charge

Which of the three subatomic particles is negative?

There are positive and negative charges. Opposites attract, like repel. This law is called_____________

Which is NOT one of the three main parts of an atom?

A Chlorine atom has 17 protons. If it were possible to give it one more proton, what would happen?

Bromine-79 and bromine-81 exist. Bromine’s atomic mass is 79.90 u. Which isotope of bromine is more common?

The number of protons plus the number of neutrons in an atom.

The nuclear model is attributed to Ernest Rutherford.

Who proposed the Saturnian model?