Coffin -Reading and Development of the Periodic Table

Front

What decreases as you move from left to right along a period on the Periodic Table?

Back

Diameter of Electron Cloud.

Front

What is the Atomic Mass of Carbon-6?

Back

12 (6 protons and 6 neutrons).

Front

Which of the following is not a noble gas: Helium, Neon, Argon, I?

Back

I.

Front

True or False: Mendeleev left blank spaces in his periodic table because some elements were not yet discovered, but he predicted where they would fit in on the table.

Back

True.

Front

How many elements were on Lavoisier's list compiled in the 1790s?

Back

33.

Front

What is the significance of Mendeleev's periodic table?

Back

It organized elements based on atomic mass and predicted the existence of undiscovered elements.

Front

What are noble gases and why are they unique?

Back

Noble gases are elements in Group 18 of the periodic table, known for their lack of reactivity due to having a full valence shell.

Front

What is the general trend of atomic radius in the periodic table?

Back

Atomic radius decreases from left to right across a period and increases down a group.

Front

What is the role of protons in determining an element's identity?

Back

The number of protons in an atom's nucleus defines the element and its position on the periodic table.

Front

What is the difference between atomic mass and atomic number?

Back

Atomic mass is the weighted average mass of an element's isotopes, while atomic number is the number of protons in the nucleus.