LD

What would you call this?

• Bounce back

• Reflection

• Diffraction

• Refraction

Tags

NGSS.MS-PS4-2

What's happening at A?

• Two crests are combining to create constructive interference.

• A crest and a trough are combining to create destructive interference.

• Two crests are combining to create destructive interference.

• A crest and trough are combining to create constructive interference.

Tags

NGSS.MS-PS4-2

NGSS.MS-PS4-1

What is the chemical symbol for Lead?

• Pb

• Ld

• Le

• Pl

Which of the following is a common use of lead in everyday life?

• Pencil lead

• Car batteries

• Cooking utensils

• Water pipes

Lead is classified as which type of element on the periodic table?

• Noble gas

• Alkali metal

• Transition metal

• Post-transition metal

What is the atomic number of lead?

• 82

• 74

• 92

• 86

Which of the following is a property of lead?

• Highly reactive

• Low density

• High density

• Transparent

Lead is often used in radiation shielding because of its:

• High melting point

• High density

• Low cost

• Magnetic properties

Which of the following is a health effect of lead exposure?

• Improved vision

• Increased energy

• Lead poisoning

• Stronger bones

Lead is most commonly extracted from which ore?

• Bauxite

• Galena

• Hematite

• Chalcopyrite