SYMBOLS AND VALENCY

Question 1

MATTER

Answer 1

ANYTHING THAT OCCUPIES SPACE, HAS MASS AND CAN BE PERCEIVED BY THE SENSES, MAYBE PURE OR IMPURE IN NATURE.

Question 2

ELEMENT

Answer 2

A PURE SUBSTANCE MADE UP OF ONE KIND OF ATOMS ONLY. IT CANNOT BE CONVERTED OR BORKEN DOWN INTO TWO OR MORE SIMPLER SUBSTANCES BY ANY PHYSICAL OR CHEMICAL MEANS.

Question 3

ATOM

Answer 3

BASIC UNIT OF AN ELEMENT WHICH MAY OR MAY NOT EXIST ON ITS OWN

Question 4

SYMBOL

Answer 4

SHORT FORM OR ABBREVIATED NAME OF THAT ELEMENT. IT REPRESENTS A SPECIFIC ELEMENT OR ONE ATOM OF AN ELEMENT. IT ALSO REPRESENTS THE WEIGHT OF THE ELEMENT EQUAL TO ITS ATOMIC WEIGHT. IT DISTINGUISHES ONE ELEMENT FROM ANOTHER AND IS CHARACTERISTIC OF THAT ELEMENT ONLY.

Question 5

VALENCY

Answer 5

THE NUMBER OF HYDROGEN ATOMS WHICH ARE COMBINE WITH OR DISPLACE ONE ATOM OF THE ELEMENT OR RADICAL FORMING A COMPOUND. VALENCY OF SOME ELEMENTS WHICH DO NOT COMBINE WITH HYDROGEN THEN BECOMES THE COMBINING POWER OF THE ELEMENT WITH AN ELEMENT WHOSE valency is known

Question 6

MONOVALENT

Answer 6

VALENCY ONE ELEMENTS ARE SAID TO BE MONOVALENT

Question 7

DIVALENT

Answer 7

VALENCY TWO ELEMENTS ARE SAID TO BE DIVALENT

Question 8

TRIVALENT

Answer 8

VALENCY THREE ELEMENTS ARE SAID TO BE TRIVALENT

Question 9

VARIABLE VALENCY

Answer 9

CERTAIN ELEMENTS THAT EXHIBIT MORE THAN ONE VALENCY. VALENCY IS THE NUMBER OF ELECTRONS LOST OR GAINED FROM THE OUTER SHELL OF AN ATOM OF AN ELEMENT. VARIATION IN THIS LOSS OR GAIN RESULTS IN VARIABLE VALENCY

Question 10

ION

Answer 10

ANY ATOM OR A GROUP OF ATOMS CARRYING A POSITIVE CHARGE OR A NEGATIVE DUE TO LOSS OR GAIN OF ELECTRONS

Question 11

CATION

Answer 11

THE POSITIVELY CHARGED IONS

Question 12

ANIONS

Answer 12

THE NEGATIVELY CHARGED IONS

Question 13

RADICAL

Answer 13

A GROUP OF ATOMS OF ELEMENTS THAT BEHAVE LIKE A SINGLE UNIT AND SHOW VALENCY