Periodic Tables And More

Question 1

What is the law of conservation of matter?

Answer 1

It is a law that states matter is not created or destroyed(it only changes form)

Question 2

Who is J J Thomson?

Answer 2

Discovered the electron in the 1900s

Question 3

Who was? Democritus?

Answer 3

Discovered atoms in 460 BC- 370bc

Question 4

Who was dmitri mendleev?

Answer 4

He created the first periodic table in 1834-1907

Question 5

What is matter?

Answer 5

Matter is anything that takes up space and has mass

Question 6

What are atoms?

Answer 6

Atoms are very small particles that make up matter

Question 7

What are elements?

Answer 7

All matter are made of elements. Elements can’t be broken down into simple substance

Question 8

What is a electron cloud?

Answer 8

They are areas where electrons are likely to be found

Question 9

What is the periodic table?

Answer 9

It is a chart that compose all known elements their properties and symbol

Question 10

What are groups?

Answer 10

Groups or family are different from each other but they all share somethings in common

Question 11

What are periods

Answer 11

Each period represent the # of energy level for the elements in that row (7 period or row that are horizontal)

Question 12

What are metals?

Answer 12

Metals are malleable(able to be hammered into shapes), metals are ductile (can cut into wires without breaking), has a luster (it’s shine)

Question 13

What are inert gases?

Answer 13

Inert gases are six elements that make up the last group in the periodic table of elements (sometimes called Nobel gas inert means inactive)

Question 14

What is a nucleus?

Answer 14

A nucleus is the center of a atom, contains protons and neutrons

Question 15

What is a proton?

Answer 15

They are positively charged particles

Question 16

What are neutron?

Answer 16

Neither positive nor negatively charged particles?

Question 17

What are electrons?

Answer 17

Surround the nucleus negatively charged

Question 18

What is the atomic number and mass?

Answer 18

The atomic mass means the number of protons and electrons. The atomic mass is found under the element symbol. The atomic number equals the number of protons and neutrons. Usually is on the top left

Question 19

What are non metals?

Answer 19

Non metals are brittle, dull, and poor conductors

Question 20

What are metalloids?

Answer 20

Metalloids have characteristics of metals and non metals

Question 21

What is he formula for the energy level?

Answer 21

X times 2 times table (X= energy level)
1=2
2=8
3=18
4=32