Chemistry College Bio Flashcards

**The ancient Greek philosophers developed the concept of the atom, calling it the fundamental particle of matter that could not be broken down. Today we accept that elements are substances consisting of one type of atom. However, we also discovered that atoms can be broken down - in __________ reactions.**

• Exothermic

• Chemical

• Nuclear

• Anaphylactoid

Tags

NGSS.HS-PS1-8

All kinds of atoms contain varying quantities of subatomic particles, arranged around a __________, as if in a solar system.

• neuron

• neutron

• nucleus

• node

Tags

NGSS.HS-PS1-8

In an atom, electrons occupy __________, or areas where they are most likely to be found.

• tracks

• orbitals

• zones

• regions

The mass of particles within an atom are measured in Atomic __________ Units (a.m.u.).

• measured

• mass

• metric

• multiple

Tags

NGSS.HS-PS1-7

Because electrons move at speeds near to that of light, we need to think of them as matter (having __________ is a property of matter), and energy ( or quanta of energy), like photons. This is also known in physics as wave-particle duality.

• conduction

• speed

• weight

• mass

Tags

NGSS.HS-PS4-3

The __________ number of an element is the number of protons contained in its nucleus.**

• prime

• cardinal

• atomic

• elemental

The atomic __________ is the number of protons plus neutrons in an atom.++

• matrix

• metric

• mass

• measure

++The number of protons--the atomic number--is unique for each element, e.g. Carbon is 6. However, the number of neutrons can differ, resulting in substances known as __________.

• isomers

• ions

• isotopes

• introns

Tags

NGSS.HS-PS1-8

A majority of isotopes show nuclear __________, e.g. the tendency of C-14 to convert into C-12. They disintegrate spontaneously with a release of energy, resulting in a process known as radioactive decay.**

• instability

• flexibility

• manageability

• immutability

Tags

NGSS.HS-PS1-8

Around the nucleus, electrons are arranged in orbitals, and each orbital can hold only __________ electrons.++

• one

• two

• three

• four