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what is a covalent crystala covalent crystal is one in which the lattice structure is held together by powerful covalent bonds these crystals tend
what is an ionic crystalan ionic crystal is one in which ionic bonds form the structure or lattice of the crystal the ions that come together to form
what is a chemical formulaa chemical formula is a way of representing molecules without drawing them the chemical formula shows the ratio of atoms
what is an ionic bondby definition an ionic bond is a chemical bond that forms between two or more oppositely charged ions the animation above shows
what are covalent bondscovalent bonds are those in which electrons are shared by the atoms and this sharing results in an attraction between the
what a molecule is and the difference between molecules and compoundsa molecule is made up of two or more atoms combined chemically the atoms can be
what is a chemical compoundby definition a compound is a substance in which two or more different elements have combined there are millions of
how are electrons arranged around the nucleuselectrons are arranged into very specific rings known as orbitals electron orbitals sometimes referred
how to calculate the mass of atoms in amus to calculate the masses of atoms we need only know the numbers of the various subatomic particles within
structure of atoms elements are pure substances elements are composed of a single kind of atom as opposed to compounds which contain two or more
how temperature of the earths layers is changedhow does the temperature of the earths interior change as one goes deeper within the earth as one
density of the earths layers density and gravity caused the proto-earth to cool and settle into four distinct layers the four layers are from top to
how big is the earththe earth size is neither the largest nor smallest planet in our solar system it is the largest of the non-gaseous planets
how did the earth form and become spherical the earths shape about five billion years ago the solar system was forming from gases and dust floating
what is relative locationrelative location is the location of something in relation of another
what is a floodplain if a river tends to flood the most practical solution might be to designate a more or less flat area along the river as the
what are decomposers in a temperate deciduous forest in the deciduous forest many decomposers that are living there contain fungi bacteria and yes
why did the continents spread apartthis is because of the heat generated from the earths interior and earthquakes - the convection currents deep
why does a glacier moveit moves due to the huge pressure of the ice and snow lowers the freezing point of its lower layers causing by to
which type of rock is critical for the formation of geysersliquid rock is required for geysers to type in the form of what is known as magma - which
which type of volcano is the most destructivewell every type of volcano can be destructive and if you are talking in human loss of life terms than
when does an atoll start to formthis starts to form when tiny marine animals - coral polyps - attach themselves to rocks on the
what ways can igneous rock form two waysigneous rocks are formed when melted material crystallizes eg from
what time period can carbon-14 dates havecarbon 14 has a half-life of 5730 years and thus it can be used to date very precisely a large majority of
what divides the outer core from the mantle above it there is a gradual transition caused by a vary in temperature and decreasing