Dimitri Mendeleev developed the first periodic table. How did he arrange the elements in the table?

In order of increasing atomic mass (atomic weight)
In order of increasing atomic number (proton number)
In order of increasing reactivity
In order of decreasing reactivity

Which of the following was a feature of Mendeleev’s periodic table?

He strictly followed the order of increasing atomic weight, ignoring chemical properties of elements
He swapped the positions of some elements based on their chemical properties
He left gaps in his table where he predicted elements would fit when discovered in the future
Elements in his table were arranged in columns (groups) with similar properties
Elements in his table were arranged in rows with similar properties

Mendeleev did not know about isotopes, this caused his periodic table to have pair reversals where elements with a higher atomic weight were placed before elements with a lower atomic weight. Which subatomic particles are found in different numbers in isotopes?

Protons
Neutrons
Electrons

In the modern periodic table, elements are arranged in increasing order of which number?

Relative atomic mass
Relative formula mass
Atomic number

Atomic number represents the number of protons in the nucleus of an atom. This means that elements further down the table have:

Less protons
More protons
Less electrons
More neutrons

In the modern periodic table, what are rows and columns called?

Rows are periods and columns are groups
Columns are periods and rows are groups
Columns are groups and rows are called rows
Rows are called atomic lines and columns are groups

In which of the following are chemical properties similar in the periodic table?

Groups
Periods
Legs
Arms

Where are metals and non-metals found on the periodic table?

Non-metals on the right, metals of the left
Non-metals on the left, metals of the right
Non-metals at the top, metals at the bottom
Non-metals at the bottom, metals at the top

Which of the following statements is accurate about group number?

Group number tells us the number of protons in the nucleus of an element
Group number tells us the number of electrons in the outermost shell
Group number tells us the number of neutrons in the nucleus of an element
Group number tells us the number of electrons in total

Which of the following is the correct maximum number of electrons in the first three shells?

2,8,8
2,6,8
4,8,8
3,7,7

What is the electronic configuration of boron?

2,4
2,3
3,2
2,7

What is the electronic configuration of hydrogen?

1
2
1,2
2,1

What is the electronic configuration of fluorine?

2,7
2,8
2,9
3,1

What is the electronic configuration of magnesium?

2,8,2
2,8,3
2,2,8
2,8,8

Which of the following statements is accurate about period number?

Period number tells us the number of occupied electron shells
Period number tells us the number of empty electron shells
Period number tells us the number of protons plus neutrons
Period number tells us the number of protons in the nucleus

What is the chemical symbol for hydrogen?

What is the chemical symbol for helium?

What is the chemical symbol for lithium?

What is the chemical symbol for boron?

What is the chemical symbol for carbon?

What is the chemical symbol for nitrogen?

What is the chemical symbol for oxygen?

What is the chemical symbol for fluorine?

What is the chemical symbol for neon?

What is the chemical symbol for sodium?

What is the chemical symbol for magnesium?

What is the chemical symbol for aluminium?

What is the chemical symbol for silicon?

What is the chemical symbol for phosphorus?

What is the chemical symbol for sulfur?

What is the chemical symbol for chlorine?

What is the chemical symbol for argon?

What is the chemical symbol for potassium?

What is the chemical symbol for calcium?

What is the chemical symbol for iron?

What is the chemical symbol for nickel?

What is the chemical symbol for copper?

What is the chemical symbol for zinc?

What is the chemical symbol for bromine?

What is the chemical symbol for silver?

What is the chemical symbol for tin?

What is the chemical symbol for iodine?

What is the chemical symbol for gold?

What is the chemical symbol for mercury?

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