8th 8.1.1 Atoms

If you were to increase the size of the atoms in a grapefruit to the size of a blueberry, how big would that make the grapefruit?

• Basketball

• Moon

• Earth

• Solar System

Answer explanation

If atoms in a grapefruit were enlarged to blueberry size, the grapefruit would expand massively. This scale-up would make it comparable to the size of Earth, as the atomic structure dictates overall size.

What takes up the most space in an Atom?

• Protons

• Neutrons

• Electrons

• Empty Space

Answer explanation

In an atom, most of its volume is made up of empty space. While protons and neutrons are densely packed in the nucleus, electrons occupy regions around the nucleus, but the vast majority of the atom's volume is actually empty space.

Which of the following are true of atoms:

• Mostly empty space

• Solid like a marble

• Our models all have some inaccuracies

• Really, really Small

Answer explanation

Atoms are mostly empty space, with a small nucleus surrounded by electrons. Our models, like the Bohr model, have inaccuracies and cannot fully represent atomic behavior. Atoms are indeed really, really small.

If an atom has 2 protons, 2 neutrons and 2 electrons; what is its Atomic mass?

• 1

• 2

• 3

• 4

Answer explanation

The atomic mass of an atom is the sum of its protons and neutrons. Here, there are 2 protons and 2 neutrons, giving a total of 4 (2 + 2 = 4). Therefore, the correct answer is 4.

Tags

NGSS.MS-PS1-1

The smallest particle into which an element can be divided and still be the same element is a(n)

• proton

• neutron

• electron

• atom

Answer explanation

The smallest particle of an element that retains its properties is the atom. Protons, neutrons, and electrons are subatomic particles that make up an atom, but they do not represent the element itself.

Tags

NGSS.MS-PS1-1

Which subatomic particle has a positive charge?

• proton

• nuetron

• electron

• atom

Answer explanation

The proton is the subatomic particle that carries a positive charge, distinguishing it from neutrons, which are neutral, and electrons, which have a negative charge. Therefore, the correct answer is proton.

Tags

NGSS.MS-PS1-1

Which subatomic particle has a negative charge?

• proton

• neutron

• electron

• atom

Answer explanation

The electron is the subatomic particle that carries a negative charge, unlike protons, which are positively charged, and neutrons, which have no charge. An atom is made up of these particles, but it does not itself have a charge.

Tags

NGSS.MS-PS1-1

Which subatomic particle has a neutral (0) charge?

• proton

• nuetron

• electron

• atom

Answer explanation

The neutron is the subatomic particle that has a neutral charge of 0. Protons have a positive charge, electrons have a negative charge, and an atom is not a subatomic particle but a whole unit made of these particles.

Tags

NGSS.MS-PS1-1

Which TWO of the following subatomic particles are inside the nucleus?

• protons

• electrons

• neutrons

• There are no subatomic particles in the nucleus of an atom.

Answer explanation

Protons and neutrons are the subatomic particles located inside the nucleus of an atom. Electrons, on the other hand, orbit the nucleus and are not found within it.

Which of the labeled structures is an electron?

• a

• b

• c

Answer explanation

The correct choice is 'a' because it represents the structure that corresponds to an electron, which is a negatively charged subatomic particle. The other options, 'b' and 'c', do not represent electrons.

Tags

NGSS.MS-PS1-1