Science lesson two

Why do atoms bond together?

a) To become stable
b) To become heavier
c) To change color
d) To produce heat

a) To become stable

True/False: Atoms combine to form molecules.

True

Circle the substances made of atoms bonded together:

Salt

Water

Sugar

Air

Salt, water, and sugar

Number of electrons = number of_____?

Same as electrons

Maximum electrons in shells

First shell:

Second shell:

Third Shell:

First shell: 2

Second shell: 8

Third Shell: 13

_____is the basics of creating different materials at the nanoscale.

Chemical bonding

Chlorine: Atomic number 17, Protons____, electrons____

17

Sodium: Atomic number 11, Protons____, electrons____

11

An atom that gains or loses electrons is called:

a) Molecule

b) lon

c) Compound

b) lon

Atoms want _____electrons in outer shell to become stable.

8

Sodium will____to become stable: a)Gain electron

B) Lose electron

B) Lose electron

How many electrons does Oxygen need to become stable?

2

Chlorine will____to become stable. a) Gain electron B) Lose electron

B) Lose electron

lonic bonds form when electrons are:

a) Shared

b) Transferred

b) Transferred

In NaCl, the Na loses an electron to become ___ ion

(a) positive

(b) negative

(a) positive

Oppositely charged ions attract due to:

A. Electrical forces

B. Gravity

A. Electrical forces

Match in terms of Energy / Structure / Genetic information

statue

Proteins -

Carbohydrates -

DNA/RNA -

Proteins - structure

Carbohydrates - energy

DNA/RNA -genetic information

covlent bond form when atoms

A. Share elections B. Transfer elections

A. Share elections

Scientists study bonding to:

a) Control how atoms stick together

b) Change gravity

a) Control how atoms stick together

Give a few examples of natural nanostructures that are formed using bonding

Sulfur and butterfly wings

Water contains: a. Ionic bonds b. Covalent bonds

Covalent bonds

Nanogold is shiny and yellow like bulk gold. True or false

False

Metals conduct electricity because they contain:

a) Oxygen

(b) Free electrons

c) Polymers

d) Molecules

(b) Free electrons

polymer is most similar to:

a) A single bead

b) A chain of paper clips

c) A metal rod

d) A glass sheet

d) A glass sheet

Metal nanoparticles are used in (circle all):

a) Car emission control

b) Pollution treatment

c) Petroleum production

d) Food coloring

c) Petroleum production

Nanogold is used for:

a) Drug delivery

b) Cooking oil

c) Paper production

d) Lighting

a) Drug delivery

Most polymers are based on which element?

A. Gold

b) Carbon

c) Aluminum

d) Sodium

b) Carbon

Most living things are mainly made from are

A. Gold and silver

(b) Hydrogen oxygen

nitrogen carbon

c) Iron and copper

d) Sodium and chlorine

b) Hydrogen oxygen

nitrogen carbon

Nanosilver is used in bandages because it:

A) Produces heat

b) Kills bacteria

c) Changes color

d) Conducts electricity

b) Kills bacteria

Molecules in the body help control (circle all):

Breathing

Digestion

Temperature regulation

Driving a car

Temperature regulation

Give one example of a polymer used in everyday life.

clothing

DNA molecules are:

a) Large objects we can see

b) Very small nanostructures

c) Metals

d) Liquids

b) Very small nanostructures

Molecular recognition means:

A. Atoms becoming ions

b) One molecule binding to another

c) Heat transfer

d) Electricity flow

b) One molecule binding to another

Insects attract each other using:

a) Electricity

b) Sound waves

C) Pheromones

d) Gravity

C) Pheromones

Allergies happen because:

a) Molecules in the body react with foreign molecules

c) Oxygen increases

b) Blood becomes hot

d) Gravity changes

a) Molecules in the body react with foreign molecules

When you smell food, what reaches your nose?

a) Heat

b) Light

c) Molecules

d) Sound

c) Molecules

Cutting a large material into smaller pieces is called:

a) Bottom-up

b) Top-down

a) Bottom-up

Which method is more like nature?

A. Top-down

B. Bottom-up

A. Top-down

Atoms →_____→ Materials → Nanotechnology

A. molecules

B. Planets

C. Forces

D. Energy

A. molecules

Which of the following nanomaterials was NEW to you in this course? (Circle all that apply)

DNA

Proteins

Nanometals

Polymers

Nanometals

How each of the nanomaterial do you think will be most important in the future?

A. DNA

B. Protein

C. Nano metal

D. Polymer

A. DNA

B. Protein

True or False: Metals conduct electricity because electrons can move through the material.

True

True or False: Creation of DNA is a bottom- up nano-fabrication approach.

True

Which of the following is a metal?

a) Wood

b) Plastic

C. Gold

d) chlorine

C. Gold

Which of the following is an example of a polymer?

c) Oxygen

a) Copper

b) DNA

d) Aluminum

b) DNA

Biological molecules are important because they help control:

a) Electricity production

(b) Processes in the body

c) Gravity

d) Sound waves

(b) Processes in the body

A polymer is best described as:

a) A single atoms

C A long chain of repeating units

d) A metal crystal

C A long chain of repeating units

Nanotechnology systems can be made using two approaches. Write their names:

Top down and bottom up

statue

Proteins -

Carbohydrates -

DNA/RNA -

Proteins - structure

Carbohydrates - energy

DNA/RNA -genetic information

covlent bond form when atoms

A. Share elections B. Transfer elections

Give a few examples of natural nanostructures that are formed using bonding

Sulfur and butterfly wings

Water contains: a. Ionic bonds b. Covalent bonds

Covalent bonds

Nanogold is shiny and yellow like bulk gold. True or false

False

A. Gold

b) Carbon

c) Aluminum

d) Sodium

b) Carbon

Most living things are mainly made from are

A. Gold and silver

(b) Hydrogen oxygen

nitrogen carbon

c) Iron and copper

d) Sodium and chlorine

b) Hydrogen oxygen

nitrogen carbon

Nanosilver is used in bandages because it:

A) Produces heat

b) Kills bacteria

c) Changes color

d) Conducts electricity

b) Kills bacteria

Give one example of a polymer used in everyday life.

Clothing

Molecules in the body help control (circle all):

Breathing

Digestion

Temperature regulation

Driving a car

Temperature regulation

DNA molecules are:

a) Large objects we can see

b) Very small nanostructures

c) Metals

d) Liquids

b) Very small nanostructures

Molecular recognition means:

A. Atoms becoming ions

b) One molecule binding to another

c) Heat transfer

d) Electricity flow

b) One molecule binding to another

Insects attract each other using:

a) Electricity

b) Sound waves

C) Pheromones

d) Gravity

C) Pheromones

Allergies happen because:

a) Molecules in the body react with foreign molecules

c) Oxygen increases

b) Blood becomes hot