C- row 2, colun II. Write "T" if the statement is true, and “F” if it is false,
Change the underlined word(s) to make the statement
true.
1. In the periodic table as suggested by Mendeleev, elements were
arranged in the order of increasing atomic number.
2. Sodium (Z=11) is a member of a group called alkaline earth
metals.
3. Elements to the extreme right of the periodic table are metals.
4. Metalloids have properties of metals and non-metals.

1). In the periodic table as suggested by Mendeleev, elements were

the periodic table as suggested by Mendeleev, elements werearranged in the order of increasing atomic number.

--> T

2). Sodium (Z=11) is a member of a group called alkaline earth

Sodium (Z=11) is a member of a group called alkaline earthmetals.

--> T

3). Elements to the extreme right of the periodic table are metals.

--> F

They are non-metals .

4). Metalloids have properties of metals and non-metals.

--> T

2h2o2--> 2h2o + o2

this reaction is of the spontaneous decomposition of hydrogen peroxide down into water and oxygen.

add 2 molecules of hydrogen peroxide and 2 molecules of water. since oxygen is naturally diatomic, the total number of atoms of each element is now the same on both sides of the equation so it is balanced.

this may not be entirely correct but let me know.

space exploration has led to the development and technological improvement of many everyday items. (if this answer is wrong i will find the right answer) : )