Non-metal with a mass number of 19 (8)
Metal harder than sodium and in the same group (7)
Gas used to stop Cs and Rb from oxidising in storage (5)
Process that causes reactive metals to discolour in air (9)
Negatively-charged sub-atomic particles (9)
Part of the atom comprising protons and neutrons (7)
Protons have a ______________ charge (8)
Protons and neutrons have a relative ________ of 1 (4)
Na is the chemical symbol for ____________ (6)
The only non-metal Group 3 element (5)
H is the ______________ of hydrogen (8,6)
The positive particle in an atom?
What is the neutral particle of an atom?
What is the negative particle in an atom?
What is the center of an atom called?
The Electrons are in the ______.
Atomic mass unit (amu) is used to measure the ______ of particles in atoms.
Protons and neutrons have a mass of ______ amu.
If protons and electrons are not ______ in an atom it is an Ion.
More electrons than protons in an atom make it ______________.
Each element is made of _____ atoms.
Do 2 positives attract or repel each other?
The number of protons equal the _________?
The sum of protons and neutrons in an atom?
the reigon of negative charge surrounding the nucleus
an ion that has more protons then electrons
no overall charges
an atom that gained or has lost an electron
a substance made up of only one type of atom
an alloy of iron and carbon
a surface that repels water
a substance that releases hydrogen iron into an aqueous solution
a substance that releases hydroxide ions
containing more than one atom
one-billionth of a metre
the basic unit in a polymer
a molecule made of repeating units formed into long chains
carbon fibres or polymer fibres embedded in a plastic matrix
a tiny cylinder of of carbon atoms are 100 nm long
a rustless alloy of steel that includes chromium and nickels
a mixture of base metal and small amounts of other metal
the number of protons in a nucleus
a pure substance that is made up of two or more different types of atoms chemically joined
a grid like structure of atoms or ions in which each particle is bounded to all of its neighbouring atoms
shatters if hit
the flow of electrons from one atom to another
electricity flowing in a controlled path
a part of an electric circuit which provides energy
converst electrical energy to another form
stops, starts, increases or decreases current in a circuit
provides a path for electrons
the amount of 'energy' the electrons have in a circuit
unit used to measure the number of electrons travelling through a circuit per second
different metals placed in a paste electrolyte
cells connected positive to negative
cells connected positive to positive and negative to negative
different metals placed in a liquid electrolyte
the voltage drop between two points is directly related to the electric current through a conductor
2 or more cells joined together
measured in ohms
a protection device which melts to open a circuit and prevent damage
a substance that cannot be broken down into a simpler substance by ordinary chemical means
the smallest unit of an element that has all of the properties of the element; basic building block of matter.
the number of protons and neutrons in the nucleus of one atom of the element.
the number of protons contained in each nucleus of its atoms of the element.
a horizontal row (left to right) in the periodic table.
a vertical column (up and down) on the periodic table.
a chart that organizes information about all of the known elements according to their atomic number.
describes how likely an element is to form bonds with other elements.
an element or substance that conducts heat and electricity, is malleable and ductile and has low ionization energy and low electronegativity values. Metals
an element that does not conduct electricity or heat and is usually a gas at room temperature. Nonmetals are brittle, have high ionization energies and high electronegativity values. Nonmetals tend to gain electrons to form anions
group 1 metals on the periodic table that contain 1 valence electron and lose their valence electrons the most easily, making them the most reactive metals.
group 1 metals on the periodic table that contain 2 valence electrons and are the second most reactive metals.
group 3-12 on the periodic table. They have varying valence electrons and do not follow the normal trends of the other metals. They form brightly colored compounds and ions in solution.
group 17 nonmetals on the periodic table that contain 7 valence electrons. They only need to gain 1 valence electron to have a stable octet. They gain valence electrons the most readily, making them the most reactive nonmetals.
group 18 elements on the periodic table that contain 8 valence electrons (He has 2) and a full valence shell making them very stable and inert.
an element that has some properties of a metal and some properties of a nonmetal. The metalloids are found on the boron staircase, there are 7 metalloids: B, Si, Ge, As, Sb, Te, and Po.
elements and/or compounds that when put together are unable to react chemically. The noble gases (group 18) elements are inert because of a full valence shell.
the charge of an atoms nucleus resulting from its number of protons
the distance between the nucleus of an atom and it's outermost energy level
the attraction a nucleus has resulting from its number of protons
Electron Dot Structure
Alkaline Earth Metals
alkaline earth metals
A charged ion is called _________.
The maximum # of electrons allowed in the firsg energy level is ____.
All elements, with the exception of noble gases, gain, lose or shared electron(s) to obtain a full valence shells of eight electrons. This is known as the ___________ rule.
Gilbert Lewis explains chemical bonding using a model known as the _______ dot or structures diagram.
A positively charged is called _________.
The alkaline earth metals react with water to form ________.
Elements that have the same number of protons but different mass numbers are called ________.
The chemical family name for group VIII elements are called the _________.
The rare earth metals are found in row ________
The most reactive nonmetals in group VII is _______.
The number of valence(s) for alkali metals is/are _______.
Dmitri Mendeleev is famous for arranging 64 known elements in an organized table called tbe __________.
Modt metals are gray or silver in coloured, except for copper and _________.
This metal is used in telecommunication because it is a good conductkr of electricit.____________
There are ________ energy levels in an atom of astatine.
Protons and neutrons are found in the _______ of an atom.
Electron carries a _________ charge.
Metals ______ electron(s) to achieve the sane electron arrangement as the closest noble gas.
Sodium loses one electron to form a cation with a ___________ one charge.
The name of an ion with two oxygen atoms joiened together with a 2- charged is called ___________.
Nonmetal ions have the ending "_____" in their names.
Aa molecule consisting of two atoms joined together in a single unit is called __________.
J J ___________ discovered the ___________.
Ernest _____________ discovered fhe nucleus of the atom.
Boht found that electrons occupied certain allowed orbits called _____________.
All halogen gain ______ electron(s) to form ions with -1 charge.
This element is used to mske steel and has 26 protons is called _______.
These metals form multivalent ions.
_____________ gain electrons to form anions.
Table _______ is called sodium chloride.
The chemical formula for __________ is H2O
This liquid metal, ____________, was used in thermometer.