CameraIcon

SearchIcon

MyQuestionIcon

1

You visited us 1 times! Enjoying our articles? Unlock Full Access!

Ores and Minerals

Look at the l...

Question

Look at the location of elements A, B, C and D in the following periodic table:
Predict whether these elements are likely to be found in nature as carbonates, oxides, sulphides or in uncombined state.

Open in App

Solution

A = Cr
B = Zn
C = Sr
D = Pt
So A exits as oxide,
B as sulphide
C as carbonate and
D as free metal

Suggest Corrections

thumbs-up

0

Similar questions

Q. Atoms of eight elements A, B, C, D, E, F, G and H have the same number of electronic shells but different number of electrons in their outermost shells. It was found that elements A and G combine to form an ionic compound which can also be extracted from sea water. Oxides of the elements A and B are basic in nature while those of E and F are acidic.
The oxide of element D is almost neutral. Answer the following questions based on the information given herein:
(a) To which group or period of the periodic table do the listed elements belong?
(b) Which one of the eight elements is likely to be a noble gas?
(c) Which one of the eight elements would have the largest atomic radius?
(d) Which two elements amongst these are likely to be non-metals?
(e) Which one of the these eight elements is likely to be a semi-metal or metalloid?

Q. Atoms of eight elements A, B, C, D, E, F, G and H have the same number of electron shells but different number of electrons in their outermost shells. It was found that elements A and G combine to form an ionic compound. This ionic compound is added in a small amount to almost all vegetables and dishes during cooking. Oxides of elements A and B are basic in nature while those of elements E and F are acidic. The oxide of element D is, however, almost neutral. Based on the above information, answer the following questions:

(a) To which group or period of the periodic table do these elements belong?
(b) What would be the nature of compound formed by a combination of elements B and F?
(c) Which two of these elements could definitely be metals?
(d) Which one of the eight elements is most likely to be found in gaseous state at room temperature?
(e) If the number of electrons in the outermost shell of elements C and G be 3 and 7 respectively, write the formula of the compound formed by the combination of C and G.

Mendeleev predicted the existence of certain elements not known at that time and named two of them as Eka-silicon and Eka-aluminium?

(a) Name the elements which have taken the place of these elements.

(b) Mention the group and the period of these elements in the Modern Periodic Table.

(c) Classify these elements as metals, nonmetals or metalloids.

Q. Mendeleev predicted the existence of certain elements not known at that time and named two of them as eka-aluminium, and eka-silicon.

(a) Name the element which has taken the place of (i) eka-aluminium, and (ii) eka-silicon
(b) Mention the period/periods of these elements in the modern periodic table.
(c) Write the group/ groups of these elements in the modern periodic table.
(d) Classify these elements as metals, non-metals or metalloids.
(e) How many valence electrons are present in the atoms of each of these elements?

Q. Elements A, B and C belong to the same period in the long form of the periodic table. The nature of the oxides of A, B and C is amphoteric, basic and acidic respectively. The correct order of the atomic numbers of these elements is :

View More

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

Existence of Elements

CHEMISTRY

Watch in App

explore_more_icon

Explore more

Ores and Minerals

Standard XII Chemistry

Join BYJU'S Learning Program

CrossIcon