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WorksheetsPeriodicity
Total questions: 15
Worksheet time: 15mins
There is no particular trend in melting point across a period. Because there are different bonds in metals and non-metals. Usually, metals have higher melting points while non-metals have very (a) melting points
Melting point of Potassium (K) is (a) than that of Sodium (Na)
Melting point of Calcium (Ca) is (a) than that of Potassium (K)
Metallic character is an ability to give electrons. Metallic character increases down the group. For example in group 17, Fluorine (F) and Chlorine (Cl) are gases while Iodine (I) is a shiny solid, like a metal. In group 16 ...
Oxygen is a non metal, while Sulfur is metal
Oxygen is a non metal, while Polonium is metal
Sulfur is a non metal, while Oxygen is metal
Polonium is a non metal, while Oxygen is metal
Metallic character has an opposite trend to electronegativity. Metals are usually at the bottom left and non-metals are at the top right. Considering that, metallic character will (a) across a period, from left to right.
Choose correct keywords.
Melting point in alkali metals, group 1 elements, ................... down the group while in group 7 it will .......................
increase, increase
increase, decrease
decrease, increase
decrease, decrease
According to the Periodic Table of the Elements, which set of elements has SIMILAR properties?
H, C, I
O, S, Se
P, S, Cl
Na, Ca, Ba
What did Mendeleev observe when he arranged the 63 known elements by increasing atomic mass on the periodic table?
A repetition pattern occurs in chemical and physical properties of elements throughout the periodic table.
An atomic weight correspond (match or agree almost exactly) to the existing abundance (amount) of each element in the universe
The number of neutrons and protons increased by one through the periodic table.
Elements that are in family groups have similar properties. Which element would have similar properties as Fluorine (F)?
oxygen (O)
sulfur (S)
potassium (K)
chlorine (Cl)
The atoms in a family group on the periodic table all have similar properties because
they have the same abbreviation
they have same number of energy levels around the nucleus
they have same number of electrons around the nucleus
they have same number of electrons in the outer energy level or section of the atom
Using the partial table, which statement is correct?
Lithium (Li) has more protons than Chlorine (Cl)
Iron (Fe) has more protons than Nickel (Ni)
Sulfur (S) has more protons than Boron(B )
Hydrogen (H) has more protons than helium (He)
After Mendeleev constructed the periodic table, he predicted the discovery of several elements that were not yet known. What prediction was Mendeleev able to make about these unknown elements, based on his table?
The unknown elements chemical and physical properties
The likely geographical place on earth where the unknown elements could be found.
The amount of the unknown element that could be found in mines and mineral deposits.
Who would discover the unknown elements
When the unknown lements would be discovered.
Which of the following trends is observed in the periodic table as you move from left to right across a period?
Atomic radius increases
Ionization energy decreases
Electronegativity increases
Metallic character increases
What is the primary reason for the periodicity observed in the properties of elements in the periodic table?
The repeating pattern of atomic numbers
The arrangement of elements by increasing atomic mass
The periodic variation in the number of neutrons
The periodic variation in the number of valence electrons
Which of the following elements would you expect to have the highest electronegativity?
Sodium (Na)
Chlorine (Cl)
Aluminum (Al)
Silicon (Si)
