Exam 11: Place and Time

The most abundant element in the universe is

The symbol for tin is

Which of the following Period 4 elements has the smallest atom?

How many valence electrons does an atom of phosphorus have?

The preferred name for N₂O (commonly called nitrous oxide) is

The Group 7A element astatine (₈₅At) would be predicted to occur in what phase?

The alkali metals have ______________ valence electron(s).

The elements that hardly ever react with other elements to form compounds are called the ______________.

If all samples of a material have identical properties and composition, it is

The amount of energy necessary to remove an electron from an atom is called that atom's ______________.

Earth's atmosphere is 78% ______________.

A watermelon is a good example of

"Buckyball" is an allotrope of the element

When the atoms of two or more elements react chemically, they usually join together to form

A bubble-producing soda is an example of

Give the name for each element.

______________ are substances that cannot be decomposed by chemical processes.

The identity of an atom is determined by its number of

What was the nationality of the first persons who we know speculated about "elements"?

An element that is malleable, ductile, and a good conductor of heat and electricity would be classified as a