Chemistry

Question 1

Atoms have a radius of 1 x 10 to power -10

Answer

true

Question 2

The nucleus is not in the middle of the atom

Answer

true

Question 3

The nucleus contain protons and electrons

Answer

true

Question 4

That nucleus is 100,000 times bigger than the atom

Answer

true

Question 5

The nucleus has a positive charge because of the protons

Answer

true

Question 6

Almost the whole mass of the atom is concentrated in the nucleus

Answer

true

Question 7

Electrons are found inside the atom

Answer

true

Question 8

Electrons are negatively charged and tiny, but cover a lot of space

Answer

true

Question 9

Electrons have virtually no mass

Answer

true

Question 10

Atoms are no neutral and they have an overall charge

Answer

true

Question 11

Atoms have no charge because they have the same number of protons as electrons

Answer

true

Question 12

The charge of protons and electrons do not cancel each other out

Answer

true

Question 13

In an ion the number of protons doesn't = number of electrons so they do have a charge

Answer

true

Question 14

The atomic number tells you how many protons there are

Answer

true

Question 15

The mass number tells you the total number of protons and electrons

Answer

true

Question 16

To get the number of neutrons, subtract the atomic number from the mass number

Answer

true

Question 17

Its the number of [blank_start]protons[blank_end] in the nucleus that decide what kind of atom it it is

Accepted Answer

protons

Question 18

If a substance only contains atoms with the same number of protons its called an

Accepted Answer

Element

Answer

Compound

Answer

Nucleus

Question 19

There are about 100 different elements

Answer

true

Question 20

[blank_start]Isotopes[blank_end] are different forms of the same element, which have the same number of protons but a different number of neutrons

Accepted Answer

Isotopes

Question 21

Isotopes have the same atomic number but different

Accepted Answer

Mass numbers

Answer

Neutron number

Answer

Relative atomic mass

Question 22

Relative atomic mass = sum of (isotope abundance x isotopes mass number)
                                        ------------------------------------------------------------------------------
                                                sum of [blank_start]abundance of all isotopes[blank_end]

Accepted Answer

abundance of all isotopes

Question 23

When elements react, atoms combine to form compounds

Answer

true

Question 24

Compounds are substances formed from two+ elements, the atoms of each are [blank_start]chemically[blank_end] bonded with fixed proportions

Accepted Answer

chemically

Answer

metallically

Answer

ionically

Question 25

Making bonds includes, giving, taking or [blank_start]sharing[blank_end] electrons.

Accepted Answer

sharing

Answer

bonding with

Chemistry

Preguntas del test (25)

Información

Escríbenos

¿Qué te parece el nuevo diseño?