8.5a 8.5b 8.5c

Which 2 characteristics describe protons?

• neutral charge

• located in the nucleus

• negative charge

• positive charge

• located in the electron cloud

Tags

8.5A

Which 2 characteristics describe electrons?

• neutral charge

• located in the nucleus

• negative charge

• positive charge

• located in the electron cloud

Tags

8.5A

Use the element tile for Sulfur (S) to match the elements with their correct label.

• S

• Element Name

• 16

• Element Symbol

• 32

• Atomic Number

• Sulfur

• Mass Number

Tags

8.5a

Protons, Neutrons & Electrons are examples of

• subatomic particles

• valence electrons

• elements

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

List the steps of the scientific method

d

e

f

c

b

a

Analyze results

Form a hypothesis

Ask a question

Draw conclusions

Conduct experiment

Communicate results

Tags

NGSS.MS-LS1-5

Which letter represents amplitude? (a)  

• A

• B

• C

• D

• E

Tags

NGSS.MS-PS4-1

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

• valence electron

• electron cloud

• atomic mass

• atom

Tags

8.5a

Use the periodic table to match the element with its description.

• 1 valence electron and mass number 1

• Tin (Sn)

• alkali earth metal with 56 protons

• Hydrogen (H)

• 8 valence electrons and 3 energy levels

• Barium (Ba)

• group 14 and period 5

• Argon (Ar)

• halogen with 4 energy levels

• Bromine (Br)

Tags

8.5c

A chemist is identifying the elements present in a sample of seawater. What characteristic of an element’s atoms always determines the element’s identity?

• The number of neutrons

• The number of protons

• The location of valence electrons

• The number of valence electrons

Tags

8.5b

Which statement accurately describes atoms of tin

• Tin atoms have 50 protons.

• Tin atoms have five valence electrons.

• Tin atoms have 119 neutrons.

• Tin atoms have 68 electrons.

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