Unit 2 Review (Bohr Models and Periodic Trends)

Front

What is the Bohr model of the atom?

Back

The Bohr model describes the atom as having a small, positively charged nucleus surrounded by electrons that travel in circular orbits at fixed distances from the nucleus.

Front

What is atomic radius?

Back

Atomic radius is the distance from the nucleus of an atom to the outermost shell of electrons, typically measured in picometers or angstroms.

Front

Which group of elements does chlorine belong to?

Back

Chlorine belongs to the halogens, which are located in Group 17 of the periodic table.

Front

What are transition metals?

Back

Transition metals are elements found in Groups 3 to 12 of the periodic table, characterized by their ability to form variable oxidation states and colored compounds.

Front

What is a metalloid?

Back

Metalloids are elements that have properties intermediate between metals and nonmetals, often exhibiting characteristics such as luster and electrical conductivity.

Front

How does atomic radius change across a period in the periodic table?

Back

Atomic radius decreases from left to right across a period due to the increasing positive charge of the nucleus, which pulls the electrons closer.

Front

How does atomic radius change down a group in the periodic table?

Back

Atomic radius increases down a group because additional electron shells are added, increasing the distance between the nucleus and the outermost electrons.

Front

What is the significance of the periodic trends?

Back

Periodic trends, such as atomic radius, ionization energy, and electronegativity, help predict the behavior of elements and their compounds.

Front

What is ionization energy?

Back

Ionization energy is the energy required to remove an electron from an atom in its gaseous state.

Front

What is electronegativity?

Back

Electronegativity is a measure of an atom's ability to attract and hold onto electrons when it is part of a compound.