Physical Science Chapter 5 The Periodic Table

Which of the following Group 7A elements is the most reactive?

Mendeleev’s periodic table was useful because it enabled scientists to predict properties of

Which element is found in nature only in compounds?

As you move from left to right across a period, the number of valence electrons

Which of the following Group 1A elements is the most reactive?

Which list of elements contains only metals?

The two most reactive groups of elements in the periodic table are the alkali metals and the

to demonstrate reactivity among the alkaline earth metals observe what happens when they are

Which statement is true about the metalloid silicon?

The column on the far left of the periodic table contains the

Compared with Group 1A elements, Group 7A elements have

Two highly reactive elements in Period 4 are the metal potassium and the

Atoms of the most reactive elements tend to have

hydrogen is located above Group 1A because it has one

Mendeleev arranged the known chemical elements in a table according to increasing

lithium, has one valence electron, , beryllium, has two. Boron, has ___ valence electrons.

Metals that grow dull when exposed to air are more _____________ than metals that remain shiny.

Among the alkali metals, the tendency to react with other substances

Which halogen is most likely to react?

The atomic number of sulfur is 16. The atomic number of phosphorus is

Which element is found in most of the compounds in your body except for water?

The usefulness of Mendeleev’s periodic table was confirmed by

Fertilizers usually contain two elements from Group 5A, which are _____________ and phosphorus.

THe rows on a periodic table are called_________. The columns are called _______.

Elements can be classified as metals, nonmetals, and _____________

An alkali metal has one valence electron, while an alkaline earth metal has

Among the alkali metals, the tendency to react with other substances

Although they are called ____________________ lights, they can contain any noble gas.

potassium calcium and scandium appear from left to right in Period 4 the most reactive is

The pattern of repeating properties of elements revealed in the periodic table is known as the

The tendency of an element to react chemically is closely related to

Which statement is NOT true about the elements fluorine, chlorine, and iodine?

left to right, which of the following values increases by exactly one from element to element?