Chemistry Fall 2024 Semester Exam Practice Flashcardizz 6

Front

How many valence electrons do atoms of elements in group 16 have?

Back

6

Front

What are the horizontal rows on the periodic table called?

Back

Periods

Front

Which elements have properties that are a mixture between metals and nonmetals?

Back

Metalloids

Front

Calculate the percent composition of sand in a mixture containing 12.45 g of salt, 8.53 g of sand, and 20.42 g of water.

Back

20.60 %

Front

Where are nonmetals found on the periodic table?

Back

To the right of the 'stair-step'.

Front

What is the definition of a valence electron?

Back

Valence electrons are the electrons in the outermost shell of an atom that are involved in forming bonds.

Front

What is the significance of the periodic table's groups?

Back

Elements in the same group have similar chemical properties and the same number of valence electrons.

Front

What are metalloids?

Back

Elements that have properties intermediate between metals and nonmetals.

Front

How do you calculate percent composition?

Back

Percent composition = (mass of component / total mass of mixture) x 100.

Front

What is the location of metals on the periodic table?

Back

To the left of the 'stair-step' line.