Cheatography

# Some Basics Of chemistry Cheat Sheet by Enthusia

Some basic concepts of chemistry for 11th.

### MATTER

 Anything that has mass and occupies space.

### STATES OF MATTER

 SOLID LIQUID GAS Particles are held very close to each other Particles are close but packed loosely compared to solids Particles are very far apart compared to solids and liquids. Not much freedom for movement of particles Particles can move around. Movement of particles is easy and fast. Definite volume & shape. Definite volume but lack definite shape. Neither definite volume nor definite shape.

### VOLUME

 Amount of space occupied by a substance. (length)³ 1000cm³ = 1000mL = 1dm³ = 1L

### MASS AND WEIGHT

 Mass- amount of matter present in substance Weight- force exerted by gravity on an object.
One should be careful in using these terms and not confuse one with the other.

### SCIENTIFIC NOTATION

 A way of expressing a number which is too large or small written in decimal form. Repres­ented in the form **N×10n NOTE- only a single digit should be placed to the left of the decimal point In the number 452.9646, we bring all the digits to the left-side of the decimal point to the right side except for the first digit. i.e., 4.529646 × 102 eg- 4345.83 = 4.34583 × 103 In the number 0.00023, we bring all the digits from the right-side of the decimal point to the left except for the last digit. eg- 0.00203 = 2.03 × 103