SC 8 P 8 5

Sodium and chlorine atoms combine in a 1:1 ration to form sodium chloride (NaCl).  Chlorine will also combine in the same ratio with any element that has similar properties to sodium.  Which of these sets of elements will also combine with chlorine (Cl) in the same ratio?

• F, Br, I, At

• H, Li, K, Rb

• O, S, Se, Te

• Mg, Al, Si, P

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-5

Two major categories of compounds in living systems are lipids and carbohydrates.  Both types of compounds are made up of carbon, hydrogen, and oxygen.  There are many different types of compounds in each category.  What can you conclude from this information?

• Most elements can be found in nature

• Elements can combine in many different ways

• Nonliving things are made up of other elements

• Living things contain only carbon, hydrogen, and oxygen

Which of the following statements is true of the elements?

• All elements can form several different compounds when combined with each other.

• Most elements can form several different compounds when combined with each other.

• Only elements in the same group can form different compounds when combined with each other.

• Only elements in the same period can form different compounds when combined with each other.

The periodic table is organized into groups and periods of elements. The characteristics of a certain group of elements are listed below.

Is liquid at room temperature

Has atoms with seven valence electrons

Which of these elements is in this group?

• Lithium

• Potassium

• Zirconium

• Bromine

Potassium (K) is found in group 1 of the periodic table.  Which group would it most likely bond with? 

• Group 1

• Group 2

• Group 7

• Group 8

Which one is NOT found on the periodic table?

• Zirconium

• Water

• Chlorine

• Hydrogen

Explain the difference between periods and groups.

• Periods go across and groups go down.

• Periods go down and groups go across.

• Periods show similar characteristics and groups show differences.

• Periods show elements and groups show compounds.

C6H12O6 is the chemical formula for glucose, a type of sugar. Which statement is true about glucose?

• Glucose is an element, because it can be separated into smaller components.

• Glucose is an element, because it is made up of more than one kind of atom.

• Glucose is a compound, because it is made of more than one element.

• Glucose is a compound, because it is made of protons, neutrons, and electrons.

Tags

NGSS.MS-PS1-1

A student has a sample of an element. Which describes a trait the sample must have in order to be considered an element?

• The sample is a liquid at room temperature.

• The sample is made of only one type of atom.

• The sample contains different types of particles

• The sample can be seen only with a microscope.

The periodic table of the elements organizes elements according to their properties. A section of the periodic table is shown.

Which set of elements below is the most similar in chemical behavior?

• H, Be, Sc

• Fr, Ra, Rf

• Ti, V, Cr

• Be, Ca, Ra