Which of the following is a metalloid?

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Si is a metalloid since; it shows the properties of both metals and non-metals.

Actinide series starts with ____.

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Actinide series starts with thorium (Z=90) and ends with lawrencium (Z=103).

Elements in the same period have similar chemical properties.

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Elements in the same period have different chemical properties, while elements in a group have similar chemical properties.

Each period in the periodic table ends with ____.

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In the periodic table, each period starts with an alkali metal and ends with an inert gas element.

____ belongs to the 2nd group of the periodic table.

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Be belongs to the 2nd group of the periodic table.

The elements of group IA have ____.

Correct! Wrong!

The elements of group IA have 1 valence electron.

The most non-metallic group among the following is ____.

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The most non-metallic group among the following is VIIA. VIIA group elements are halogens and all elements in this group are non-metallic.

An oxide of an element is a gas and dissolves in water to give an acidic solution. The element belongs to the ____ group.

Correct! Wrong!

An oxide of an element is a gas and dissolves in water to give an acidic solution. The element belongs to the IVA group. The oxides of non-metals form acidic solutions in water. Among the given options, elements of the lVA group are non-metals.

Ca, Sr and Ba are alkali metals.

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Ca, Sr and Ba are alkaline earth metals. Their oxides are alkaline in nature and exist in the earth's crust.

There are ____ elements in the third period of the periodic table.

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There are 8 elements in the third period of the periodic table.

Elements of group 17 are called halogens because they ____.

Correct! Wrong!

Elements of group 17 are called halogens because they are obtained from sea salts.

Metalloids combine with oxygen to form ____ oxides.

Correct! Wrong!

Metalloids combine with oxygen to form amphoteric oxides.

____ elements are known so far.

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118 elements are known so far.

An element X belongs to group 16 and the 3rd period. The element is ____.

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The element X of group 16 and the 3rd period is S. The electronic configuration of the element is 1s22s22p63s23p4.

The elements in a group have ____.

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The elements in a group have a similar electronic configuration, therefore, they possess the same chemical properties.

In the periodic table rubidium and radium are present in groups ____ respectively.

Correct! Wrong!

In the periodic table rubidium and radium are present in groups 1 and 2 respectively.

The element with the atomic number 11 belongs to the ____.

Correct! Wrong!

The element with the atomic number 11 belongs to the first group. Electronic configuration of the element having the atomic number 11 = 1s22s22p63s1. Since, the last orbit of the element has one electron; it belongs to the first group.

The first and the last element in the largest period of the modern periodic table are ____.

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Cs is the first element and Rn is the last element of the largest period (sixth period) in the modern periodic table.

The atomic size of the elements of group I ____ as we move down the group.

Correct! Wrong!

The atomic size of the elements of group I increases as we move down the group.

Carbon belongs to the 2nd period of group 14. Silicon belongs to the 3rd period of group14. If the atomic number of carbon is 6, the atomic number of silicon is ____.

Correct! Wrong!

Silicon is the 8th element after carbon. Therefore, the atomic number of silicon is 6 + 8 = 14.

Magnesium belongs to the ____ group.

Correct! Wrong!

Magnesium belongs to the llA group.

In a long form periodic table, the elements in a period are arranged according to the ____.

Correct! Wrong!

In a long form periodic table, the elements in a period are arranged according to strict sequence of increase in atomic number.

Which of the following periods contain solid, liquid and gaseous elements?

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The fourth period contains solid, liquid and gaseous elements.

The period that contains only gaseous elements is the ____ period.

Correct! Wrong!

The first period contains only hydrogen and helium, which are in a gaseous state.

Which of the following sets of elements do not belong to the same group?

Correct! Wrong!

P, S, Cl belong to same period, but not the same group.

ICSE Class 10th Chemistry 1 - Periodic Properties and Variations MCQs
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