Worksheetsphysical science Q1
Total questions: 13
Worksheet time: 12mins
WHICH IS THE MOST STANDARD UNIT OF A PIECE OF MATTER?
Molecules
Atoms
Protons
electrons
spongebob
What is a molecule
group of atoms bonded together,
another word for atom
a mixture of elements
smallest fundamental unit of a chemical compound
An Ion is an atom that has
to many or to few protons to be stable
to many or to few electrons to be stable
to many or to few molecules to be stable
to many or to few neutrons to be stable
cation
positively charged ion
Anion
a negatively charged ion
Electron configuration
the arrangement of electrons around the nucleus of a particular atom or molecule
valence electron
the electrons on the outermost shell
nucleus
contains both protons and neutrons
What happens to a electron when it moves away from the nucleus
it gains energy
it often spins away
it turns to a wave
it loses energy
(within the bounds of this class) Can atoms be destroyed?
only under lots of pressure
no
yes
only if they explode
What is a Rutherford model
the basis for the preiodic table
A model that uses dots around an atom to show it's valence electrons
a model that shows electrons and protons together
A model that introduced the negatively charged electrons surrounding the nucleus
Molecule
a group of atoms bonded together, representing the smallest fundamental unit of a chemical compound
Compound
a thing that is composed of two or more separate elements, a mixture.
Mixture
composed of one or more pure substances in varying composition
Atom
the basic unit of a chemical element
element
a substance that cannot be broken down by any non-nuclear reaction
what group is hydrogen (H) in?
2
4
3
1
what period is potassium (K) in?
2
4
3
1
acid (defniition)
a chemical substance that neutralizes alkalis, dissolves some metals,
base (definition)
any substance that in water solution tastes bitter, reacts with acids to form salts
Acids and bases
produce ions in water solution
Acids release
hydrogen ions
Bases release
hydroxide ions
Isotopes Definition
an element that has equal amount of protons but different number of neutrons: stable
Radioactive Isotopes
element unequal protons and neutrons whose nuclei are unstable and dissipate any excess energy
Average atomic mass
made up of isotopes, that have the same number of protons but different numbers of neutrons
Atomic mass
average mass of individual atoms in a given element.
Radiation
the energy that comes from a source that travels through space at the speed of light
Radioactive decay
the emission of energy in the form of ionizing radiation
Octet rule
refers to the tendency of atoms to prefer to have eight electrons in the valence shell
