Unit 1 Chemistry Flashcard

Front

What is the maximum number of electrons that can be held by an orbital?

Back

2

Front

What happens to electronegativity down a group (column) using Coulomb's Law?

Back

Electronegativity decreases down a group, because there is an increasing distance from the nucleus, causing a decrease in force and a larger radius.

Front

How do you determine the nearest noble gas?

Back

Find the noble gas (Group 18) atomic number that is closest to the element in the periodic table and has an atomic number less than the element's atomic number.

Front

What happens to atomic radius down a group (column) using Coulomb's Law?

Back

The atomic radius increases because of additional energy levels. This increases the distance between electrons and nucleus, causing decrease in force and larger radius.

Front

What is the formula for finding mass?

Back

Number of moles × Molar mass

Front

What is the definition of electronegativity?

Back

Electronegativity is the tendency of an atom to attract electrons in a chemical bond.

Front

What is the periodic trend for atomic radius across a period?

Back

Atomic radius decreases across a period due to increasing nuclear charge pulling electrons closer.

Front

What is the significance of Avogadro's number?

Back

Avogadro's number (6.022 x 10^23) is the number of particles in one mole of a substance.

Front

What is the relationship between moles, mass, and molar mass?

Back

Moles = Mass / Molar Mass.

Front

What is the definition of a noble gas?

Back

Noble gases are elements in Group 18 of the periodic table that are characterized by their lack of reactivity due to having a full valence shell.