ES Ch 5: Periodic Table Atoms!

How does the atom changes it releases radioactive energy?

Which of the following is not true?

The range of the strong nuclear force is approximately:

What is the mass in grams of 0.75 mol of sulfur, which has a molar mass of 32 g/mol?

Valence electrons determine an atom's

 of the following is not a type of orbital?

Which has not been used as an atomic model of the atom?

What was Avogadro's first name?

Which element is in group 2 of the periodic table?

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

Molar mass is defined as

A subatomic particle that has a negative charge is called an 

Which element is mostly used to allow this blimp to fly in the air?

The element "Polonium" is named after:

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

What does the period in the periodic table represent?

Marie Curie has been awarded Nobel Prizes in:

Atoms have no electric charge because they

Which element is the most common in the universe?

If the atomic mass of carbon is 12 u, 1 mole of pure carbon will have a mass of 

What does the group in the periodic table tell us about an element?

What is the mass of 2.5 mol of Ca, which has a molar mass of 40 g/mol?

According to Rutherford's model of the atom, electrons behave like

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

Molar mass is measured in:

Thomson is responsible for discovering that an atom contains

Which of the statements are not true?

Archaeology can determine the age of an object by studying the carbon-14 because it is...

Complete this statement: Carbon-14 is a different ___________ from Carbon-12.

An electron jumps to a new energy level when

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

A mole is an SI base unit that describes the

The average atomic mass of potassium is approximately 39 u.  What is the mass of 2.0 mol of K?

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

Chlorine has an atomic mass of 35.45 because the percentage of Chlorine-35 and Chlorine-37 are:

The average atomic mass of an element is approximately 133 u.  What is the mass of 3.00 mole

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

Which scientist proved the existence of the nucleus through the gold foil experiment?

What is N_A? (Jimin)

Which element is most likely to gain an electron?

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

Which element does not normally form bonds with other elements?

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

The charge of an atom is 

Thomson made his discovery about the atom during an experiment using

Avogadro's number is useful for

An element's isotopes of an element have different

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

Dmitri Mendeleev, the father of the periodic table, is from which country?

An atom's mass number equals the number of 

Two different isotopes of an element have different

A mole is an SI base unit that describes the 

What is an atom's nucleus made of?

A sodium atom, has 11 electrons, has ____ electrons in its third energy level.

What is a characteristic of Alkali Metals?

If the average atomic mass of carbon is 12.01 u, 1 mole of pure carbon will have a mass of 

What is the molar mass of an element with an average atomic mass of 9.012 u?

What noble gas is in an excited state in this picture?

The number of energy levels filled in an atom is determined by

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

Who discovered radioactivity?