AFNR

What is the smallest part of an element that retains its identity in a chemical reaction?

• Atom

• Element

• Electron

• Proton

Tags

NGSS.HS-PS1-7

Why were the ideas of Democritus not useful in a scientific sense?

• He stated that atoms a indivisible

• He stated that atoms a indestructible

• His approach was not based on the scientific method

• He was able to explain chemical behavior

Which is not true about Dalton's atomic theory?

• All elements are composed of tiny, indivisible particles called atoms

• An element is composed of several types of atoms

• Atoms of different elements can physically mix together

• Chemical reactions occur when atoms are separated, joined, or rearranged

Tags

NGSS.HS-PS1-7

About how many copper atoms placed side-by-side would create a line 1 cm long?

• 10

• 1000

• 100,000

• 100,000,000

Which is true about how the atomic theory today differs from Dalton's atomic theory?

• Atoms are now known to be divisible

• Atoms of the same element are identical

• Atoms from different elements can be mixed

• Chemical reactions occur when atoms are separated, joined, or rearranged

Which subatomic particles carry a negative charge?

• Protons

• Neutrons

• Electrons

• Atoms

Which subatomic particles carry a positive charge?

• Protons

• Neutrons

• Electrons

• Atoms

Which subatomic particles carry a neutral charge?

• Proton

• Neutron

• Electron

• Atom

Which is not true about atoms, matter, and electric charge?

• All atoms have an electric charge

• Electric charges are carried by particles of matter

• Electric charges exist as whole numbers

• When positive and negative charges equal out, a neutral particle is formed

Tags

NGSS.HS-PS2-5

Which is not true about nuclear theory suggested by Rutherfords gold foil experiment

• An atom is mostly empty space

• All the positive charge of an atom is concentrated in a small central region called the nucleus

• The nucleus is large compared to the atom as a whole

• Nearly all the mass of an atom is in the nucleus

Tags

NGSS.HS-PS1-8