Atoms and the Periodic Table (8.5A - 8.5B - 8.5C)

Front

What is the mass number of this element? Options: 5, 27, 32, 59

Back

59

Answer explanation

The mass number of an atom is the mass of the nucleus:

Protons + Neutrons = Mass

In this example:

Protons (27) + Neutrons (32) = Mass (59)

Tags

8.5a

Front

An atom of a certain element has 11 electrons, and a mass number of 23. This element is very reactive in room temperature. How many neutrons are in this atom?

Back

12

Answer explanation

An atom of a certain element has 11 electrons, and a mass number of 23. This element is very reactive in room temperature. How many neutrons are in this atom?

If you use your APE MAN formula:

A (Atomic Number) = 11

P (Protons) = 11

E (Electrons) = 11

M (Mass Number) = 23

• -- A (Atomic Number) = 11

  • N (Neutrons) = 12

Front

Protons, Neutrons & Electrons are examples of

Back

subatomic particles

Answer explanation

Subatomic:

Sub = lower (smaller)

Subatomic

-ic = having to do with

Sub + atom + ic

Parts of an atom, smaller than an atom

subatómico

Tags

8.5a

Front

The smallest particle of an element; made of electrons, protons, and neutrons

Back

atom

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8.5a

Front

Which characteristic of calcium is most closely related to its chemical reactivity?

Back

The 2 valence electrons in each atom of calcium

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8.5b

Front

What characteristic of an element’s atoms always determines the element’s identity?

Back

The number of protons

Tags

8.5b

Front

What reasonable conclusion can be made from the information given? Options: Element 1 has the same atomic mass as Element 4, Element 3 has very similar chemical properties as Element 4, Element 1 has very similar chemical properties as Element 3, None of the above

Back

Element 3 has very similar chemical properties as Element 4

Tags

8.5b

Front

Which statement accurately describes atoms of tin?

Back

Tin atoms have 50 protons.

Answer explanation

Tin (Sn) has an atomic number of 50, which means the number of protons is also 50 (A=P=E).

On the periodic table, Tin (Sn) is in Group 14, which means it has 4 valence electrons.

Tin (Sn) is also in Period 5, which means it has 5 energy shells.

Tags

8.5c

Front

Identify the location of elements in the periodic table based on clues printed on game cards. Which periodic table shows the correct location of the four elements?

Back

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8.5c