Physics

What is meant by the term nucleon? An electron Antimatter A proton or neutron A quark

A proton or neutron

As the text cites, atoms are incredibly tiny, numerous, perpetually moving, and what else? Migratory New in science Ageless Mainly in the air

Ageless

What is a compound? Cite two examples. Atoms of different elements with bonds between them: NaCl and H2O Atoms pressed together without bonding: air and salt and sand The same types of atoms bonded together: H2 and N2 Atoms of different elements with bonds between them: NaCl and H2

Atoms of different elements with bonds between them: NaCl and H2O

What is a mixture? Cite two examples. Atoms of different elements with bonds between them: NaCl and H2O The same types of atoms bonded together: H2 and N2 Atoms pressed together without bonding: air and salt and sand Atoms pressed together without bonding: H2O and H2

Atoms pressed together without bonding: air and salt and sand

What are the five most common elements in humans? H2O, O2, Ca, N2, and C C, H, O, N, and Ca C, H, O, N, and Fe H, He, C, O, and N

C, H, O, N, and Ca

Part complete Which of the following are negatively charged? Electrons Neutrons Atomic nuclei Protons

Electrons

The element gold contains: A. Gold Atoms B. Atoms that combine to produce gold C Gold atoms plus various slightly lighter and heavier atoms D. None of the above

Gold Atoms

What is the evidence that dark matter exists? Gravitational forces within galaxies are too great to be accounted for with ordinary matter. When dark matter clouds collide, they emit light. When dark matter falls into a black hole, it emits light. Dark matter blocks distant light and can be seen as dark clouds in space.

Gravitational forces within galaxies are too great to be accounted for with ordinary matter.

What is the most abundant element in the known universe? Helium Hydrogen Carbon Iron

Hydrogen

Which of the following is an element? A supernova Carbon dioxide Hydrogen H2O

Hydrogen

Where in the atom is most of its mass concentrated? What is this mass composed of? In the nucleus as protons and neutrons In the electron cloud In the nucleus as electrons In a cloud of nucleons surrounding the nucleus

In the nucleus as protons and neutrons

How does the electric charge of a proton compare with the electric charge of an electron? It is about 2000 times larger. It is about 2000 times larger and opposite in sign. It is equal and opposite. It is equal.

It is equal and opposite.

What occurs when a proton and an antiproton meet? They electrically repel each other. They gravitationally repel each other. They do not interact in any way. They annihilate each other.

They annihilate each other.

How do matter and antimatter differ? Matter emits light, whereas antimatter absorbs it. Matter gravitationally attracts matter and repels antimatter. When matter and antimatter meet, they annihilate in a flash of energy. Antimatter has negative weight.

When matter and antimatter meet, they annihilate in a flash of energy.

The periodic table of the elements is a list of __________. isotopes atoms molecules ions

atoms

To become a positive ion, does an atom lose or gain an electron? loses gains

loses

The charge in the nucleus of an antimatter hydrogen atoms is __________. negative positive exotically different than positives and negatives neutral, no charge

negative

Dark matter is considered to be __________. at the center of all atomic nuclei a form of dark energy a local phenomenon plentiful in the universe

plentiful in the universe

To become a negative ion, does an atom lose or gain an electron? loses gains

gains