Module 1.1 and 1.2

CHOOSE FOUR: Which of the elements listed below are in highest abundance in the human body?

• carbon
• hydrogen
• nitrogen
• oxygen
• calcium

Elements that are in very small quantities (less than 1% of the human body) but are still necessary for life are called:

• micro elements
• small elements
• trace elements
• macro elements

The smallest particles of a pure element are called:

• atoms
• molecules
• nucleus
• neutrons
• electrons

Label the atom using the choices provided.

a

b

c

d

nucleus

neutron

electron

proton

Tags

NGSS.MS-PS1-1

Which subatomic particles are found in the nucleus of an atom? Choose all that apply.

• electron
• proton
• neutron

If a neutral atom has 10 protons, how many electrons does it have?

• 5
• only 1
• 10

Which of the following subatomic particles determine that atom's bonding tendencies to other atoms?

• protons
• neutrons
• electrons

Answer explanation

Another way to say "bonding tendencies" is to ask which part of the atom allows it to stick to another atom?

The electrons in the atom are the parts that are shared, donated or received between different atoms and this causes them to bond (stick together).

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Where are electrons found within an atom?

• in the atom's nucleus
• orbiting around the nucleus of the atom in a cloud like formation with different "layers" called shells

What creates an stable atom that is unlikely/unable to bond with other atoms?

• when the number of protons equals the number of neutrons
• when the number of electrons in the outermost (valence) shell is full at 8 electrons

When 2 or more atoms bond together, they are known as

• organelles
• ions
• isotopes
• molecules

Tags

NGSS.MS-PS1-1