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Worksheetschemistry
Total questions: 8
Worksheet time: 25mins
Period 3 is the ___________________ row in the Periodic Table
vertical
horizontal
if the element at 7 valence electrons and 3 shells filled with electrons, What is the position of the element in the Periodic Table?
Period 7 Group 3
Period 7 Group 13
Period 3 Group 7
Period 3 Group 17
Element M is placed in Group 14 and Period 3 of the Periodic Table. What is the electron arrangement of an atom M?
2.3
2.4
2.8.3
2.8.4
Table 2 shows the relative atomic masses and number of neutrons for the elements G and J. G and J are not the actual symbols of the elements.
Which of the following statements are true about these elements?
I Element G is more reactive than element J.
II Atoms G and J have two valence electrons.
III Elements G and J are in the same group in the Periodic Table.
IV Elements G and J can conduct electricity.
I and II
I and III
II and IV
III and IV
Neon gas is used to provide an inert atmosphere for welding. Which of the following explains this property of neon?
It has a stable electron
arrangement
It is placed in Group 18 of the
Periodic Table
It exists as monoatomic gas
It has low melting and boiling
points
Element G, J, and L are located in Group 17 of the Periodic Table. Atomic radius of element J is the smallest. In an experiment, when vapour L is passed over hot iron wool, the iron wool glows brightly. When vapour G is passed over hot iron wool, the iron wool glows dimly. The reactivity of elements G, J, and L in ascending order is ...
L, G, J
G, L, J
G, J, L
J, L, G
Table 3 shows the nucleon number and number of neutrons for elements W, X, Y and Z.
W
X
Y
Z
Which characteristic is correct for the elements according to the sequence as shown below?
Solubility in water increases
Reactivity increases
Electrical conductivity increases
The strength to accept an electron decreases
