Yes, it is correct. The standard form of the table consists of a grid of elements laid out in 18 columns and 7 rows. The lanthanides and actinides are accommodated in 6th and 7th periods respectively.

Yes, it is the only non-metal in group 1. It is classed with group 1 because, like the alkali metals it has only 1 outer shell.

Yes, this is the correct answer.

Yes, it is the correct answer. The f-block transition elements are sometimes known as inner transition elements. The first row of them is called the lanthanides or rare earths. The second row consists of the actinides.

Yes, it is the correct answer. Al is not a transition element. The transition elements include the important metals: iron, copper and silver. Iron and titanium are the most abundant transition elements.

It is a radioactive, colourless, odourless, tasteless noble gas, occurring naturally as an indirect decay product of uranium or thorium.

Yes, it is the correct answer. Elements having valence electrons equal to 3 are placed in the 13th group.

Yes, all are correct.

Yes, it is the correct answer. Both b and d are  false statements. 

Yes, it is correct. All the three options are true. Atoms of metals tend to lose electrons, the strong attraction does not allow loss of electrons, causing metallic character to decrease from left to right in a period. Atomic mass increases from top to bottom and across a period the electronegativity increases.

Yes, this is the correct answer.

Yes, it is the incorrect statement. Valency first increases up to 4 on moving from left to right in a period and then decreases up to zero.

Yes, it is correctly matched. Valence electron is one and the group to which it belongs is one.

Newlands found that every eighth element has similar physical and chemical properties. If one starts with lithium (atomic mass = 6) and arrange the elements in increasing order of their atomic masses, the eighth element will be sodium (atomic mass = 23). Both elements show the same physical and chemical properties.

Yes, it is the correct answer. He arranged three elements in one group which is known as ‘triad’. Such arrangements of elements are known as Dobereiner’s triads.