Chemistry Semester 1 final

Front

Which halogen is found in period 4?

Back

Bromine (Br)

Front

In an endothermic reaction, heat is ...

Back

taken in or absorbed

Front

Which element is not a metal?

Back

B (Boron)

Front

What is the safest way to smell a substance during a lab?

Back

Waft the air towards your face

Front

Why are ions formed?

Back

Because atoms want to be stable with 8 valence electrons.

Front

What is a halogen?

Back

A group of elements in Group 17 of the periodic table, known for their reactivity.

Front

Define endothermic reaction.

Back

A reaction that absorbs heat from its surroundings.

Front

What is the periodic table?

Back

A tabular arrangement of elements organized by increasing atomic number.

Front

What are valence electrons?

Back

Electrons in the outermost shell of an atom that determine its chemical properties.

Front

What is the difference between metals and nonmetals?

Back

Metals are typically shiny, conductive, and malleable, while nonmetals are dull, insulative, and brittle.