Click to flip
Click to flip

C
H
O
O
S
E

T
O
P
I
C

Choose a topic


protons are ________ charged?

positively charged

where are protons located?

They are located in the nucleus

Neurons are _______ charged?

they have a neural charge

where are neutrons located?

They are located in the nucleus

Electrons are _______ charged?

they are negatively charged

Are Electrons found in the nucleus?

Electrons are NOT located in the nucleus

what is atomic number?

Atomic number is the number of protons in the nucleus

What is the approximate atomic mass of an atom with 16 neutrons, 15 protons, and 15 electrons

31 daltons

Oxygen has an atomic number of 8 and a mass number of 16. Thus, the atomic mass of an oxygen atom is

approximately 16 daltons.

The nucleus of a nitrogen atom contains 7 neutrons and 7 protons. Which of the following is a correct statement concerning nitrogen?

The nitrogen atom has a mass number of 14 and an atomic mass of approximately 14 daltons.

Calcium has an atomic number of 20 and an atomic mass of 40. Therefore, a calcium atom must have

20 protons.

An atom with an atomic number of 9 and a mass number of 19 would have an atomic mass of approximately

19 daltons.

Different atomic forms of an element contain the same number of protons but a different number of neutrons. What are these different atomic forms called?

isotopes

The atomic number of carbon is 6. Carbon-14 is heavier than carbon-12 because the atomic nucleus of carbon-14 contains _____ neutrons.

8

From its atomic number of 15, it is possible to predict that the phosphorus atom has

15 protons.
15 electrons

Fluorine has an atomic number of 9 and a mass number of 19. How many electrons are needed to complete the valence shell of a fluorine atom?

1

The atomic number of chlorine is 17. The atomic number of magnesium is 12. What is the formula for magnesium chloride?

MgCl2

The atomic number of sulfur is 16. Sulfur combines with hydrogen by covalent bonding to form a compound, hydrogen sulfide. Based on the number of valence electrons in a sulfur atom, predict the molecular formula of the compound

H2S

what is mass Number?

Mass Number is the number of protons and neutrons in the nucleus

The mass number of an element can be easily approximated by adding together the number of __________ in an atom of that element.

protons and neutrons