Question

Q.1
Sub: Science
What does it mean by "the length of an object is five
meters?"

Write the name of first 20 elements with their symbol.

Hope you will help me
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Answer 1

Explanation:

h hydrogen

he helium

li lithium

be berylium

Answer 2

Answer:

Length is the term used for identifying the size of an object or distance from one point to Length is a measure of how long an object is or the distance between two points.  The length of an object is its extended dimension, that is, its longest side. For example, the length of the ruler in the picture is 15 cm.

1

Hydrogen

H

2

Helium

He

3

Lithium

Li

4

Beryllium

Be

5

Boron

B

6

Carbon

C

7

Nitrogen

N

8

Oxygen

O

9

Fluorine

F

10

Neon

Ne

11

Sodium

Na

12

Magnesium

Mg

13

Aluminium

Al

14

Silicon

Si

15

Phosphorus

P

16

Sulfur

S

17

Chlorine

Cl

18

Argon

Ar

19

Potassium

K

20

Calcium

Ca