Elements; Bonding; Identifying Properties of Matter

The first word re: atoms was a Greek word called "atomos." What does "atomos" literally mean?

• very large

• very small

• infinitely divisible

• uncuttable

• building block made of subatomic particles & empty space

Tags

NGSS.MS-PS1-1

What influence do the protons located in the center of the atom have on the electrons on the outside of the nucleus?

• Protons repel electrons

• Protons attract electrons

• Protons have no effect on electrons

• Protons cancel charge of electrons

• Protons attract electrons and cancel charge of electrons

Tags

NGSS.MS-PS1-1

What vertical column on the Periodic Table has the most stable set of outside electrons and the lowest chemical reactivity?

• group 1a

• 2a

• 4a

• 6a

• 8a

What does the "octet rule" claim?

• 8 valance electrons are typically the most stable number

• atoms arrange themselves in groups of 8

• all elements are equally likely to chemically combine

• all elements are equal in their chemical reactivity

Tags

NGSS.MS-PS1-1

What 2 factors of matter most affect the strength of a chemical bond?

• number of (+) and (-) charges & state of matter

• number of (+) and (-) charges & distance between the charges

• number of atoms and distance between atoms

• number of neutrons in each bonded atomic nucleus and distance between bonded atoms

Tags

NGSS.MS-PS2-3

What happens to atomic radius (pm) as you move left to right across a horizontal row of the Periodic Table?

• it stays constant

• it goes up

• it decreases

• it can never be measured

Tags

NGSS.MS-PS1-1

What are valence electrons?

• number of (+) and neutral particles in the nucleus of an atom

• total number of (-) charges outside the nucleus of an atom

• number of outside (-) charges around an atom

• number of atoms is a sample of matter

Tags

NGSS.MS-PS1-1

What did early alchemists claim they could make in their chemistry experiements?

• gold

• medicines that could make you live longer

• a change of one element type into another

• all the other answers are correct

Tags

NGSS.MS-PS1-5

Which of the following elements (aka: elementos) of Aristotle were in fact proven not to be elements as we know it today?

• earth

• air

• fire

• water

• all of the other elements were proven by experiment to not be elements

What of the following parts of each section of an electron configuration's code is important for locating an element on the Periodic Table and knowing its stability?

• number of electron layers (aka: coefficient number)

• type of electron pathway (aka: s, p, d, or f)

• number of electrons (aka: exponent of each code step)

• all of the other answers are important

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2