Periodic Table

Question 0

What nickname was given to the model of the atom proposed by john dalton?

Answer 0

Billiard ball model

Question 1

Which scientists model was the first to introduce the idea of electrons

Answer 1

Thomson

Question 2

The solar system model of the atom was developed by…?

Answer 2

Thomson

Question 3

The idea that an atom has a dense positive nucleus was proposed by..?

Answer 3

Rutherford

Question 4

According to the current model of the atom electrons exits where?

Answer 4

In orbitals

Question 5

The atomic mass of an element indicates the?

Answer 5

Sum of protons plus neutrons

Question 6

The atomic number of magnesium is 12. It nucleus most contain?

a. 6 protons and 6 neutrons
b. 12 protons and no electrons
c. 6 neutrons and no neutrons

Answer 6

b. 12 protons and no electrons

Question 7

The elements in the periodic table are arranged by?

Answer 7

Atomic number

Question 8

Horizontal rows of elements in the periodic table are called?

Answer 8

Periods

Question 9

Vertical columns of elements in the periodic table are called?

Answer 9

Groups

Question 10

Isotopes of the same element may differ in their number of?

Answer 10

Neutrons

Question 11

An ion of a certain atom has a different number of..?

Answer 11

Electrons then usual

Question 12

The periodic table was designed by who?

Answer 12

Mendeleev

Question 13

Properties of metals

Answer 13

Shiny

Good conductors

Question 14

Metalloids are located where on the periodic table?

Answer 14

On the right after the metals

Question 15

Examples of physical changes

Answer 15

Melting, boiling, freezing,

Question 16

Examples of chemical changes

Answer 16

Water evaporating

Question 17

Indicators of a chemical change?

Answer 17

Changes the kinds of molecules present

Difficult to reverse

Question 18

An element has more electrons than protons. True or false?

Answer 18

False! An element has the same amount of electrons and protons

Question 19

Isotopes of the same element have different atomic numbers. True or false

Answer 19

False! isotopes of the same element have a different amount of electrons

Question 20

Atomic symbols are the same in each country and language. True or false

Answer 20

True!!!

Question 21

There are four elements! Fire, earth, water, air. True or false

Answer 21

False

Question 22

All elements have been found. True or false?

Answer 22

False there are still many unfound elements

Question 23

A proton is heavier than an electron. True or false?

Answer 23

True a proton is much heavier

Question 24

A group of atoms with the same amount of protons but different amount of neutrons is called?

Answer 24

An isotope

Question 25

An atom with a different number of electrons is called?

Answer 25

An ion

Question 26

If there are extra electrons it will be.... a. Negative b. positive

Answer 26

a. Negative

Question 27

If there are missing electrons it will be? a. Negative | b. Positive

Answer 27

b. positive