1st 9wks Review

What name is given to the elements in Groups 3 through 12? 

• Transition Metals
• Alkaline Earth Metals
• Rare Earth Metals
• Alkali Metals

An atom has 29 protons, 29 electrons, and 35 neutrons.  What is the mass number of the atom?

• 29
• 35
• 64
• 93

Tags

NGSS.MS-PS1-1

How many protons and neutrons are there in an atom of Boron?

• 5 protons, 6 neutrons
• 5 protons, 11 neutrons
• 11 protons, 5 neutrons
• 11 protons, 6 neutrons

A gemstone has a mass of 6.24 grams and a volume of 1.98 cm3.  What is the density of the gemstone?

• 2.20
• 3.01
• 3.15
• 3.50

Which element has the same number of valence electrons as Krypton (Kr)?

• Neon (Ne)
• Fluorine (F)
• Chlorine (Cl)
• Selenium (Se)

Tags

NGSS.HS-PS1-1

Which statement best describes the atoms of elements that form compounds by covalent bonding?

• they share electrons between them
• they have a large difference in atomic number
• they are in the same period in the periodic table
• they have a large difference in valence electron number

Atoms of which two elements will form an ionic bond?

• Mg and Cl
• N and O
• Fe and Co
• Rb and Al

Tags

NGSS.HS-PS1-2

What is the correct name for the compound NaNO₃?

• sodium nitrate
• sodium nitrous acid
• sodium nitrogen oxide
• sodium nitrogen trioxide

What is the chemical formula for magnesium hydroxide?

• Mg(OH)₂
• MgOH
• MgOH₂
• Mg₂OH

Tags

NGSS.HS-PS1-7

Which substance is most likely classified as a colloid?

• soft drink
• fog
• water
• oxygen gas