Periodic Table 8th grade

Front

What is the atomic number of Bromine?

Back

35

Front

How many electrons does Boron have?

Back

5

Front

What type of element is found in group 16, period 3?

Back

Nonmetal

Front

How did Mendeleev arrange the periodic table?

Back

By increasing atomic number.

Front

Which elements are classified as metalloids?

Back

Boron (B) and Silicon (Si).

Front

What is the definition of a metalloid?

Back

Elements that have properties of both metals and nonmetals.

Front

What is the significance of the atomic number?

Back

It represents the number of protons in an atom's nucleus.

Front

What are the three main categories of elements in the periodic table?

Back

Metals, Nonmetals, and Metalloids.

Front

What is the general trend of reactivity in the alkali metals?

Back

Reactivity increases down the group.

Front

What is the difference between atomic mass and atomic number?

Back

Atomic mass is the weighted average mass of an element's isotopes; atomic number is the number of protons.