Matter and Atoms and Isotopes Week 2 (Module 2a and 2b)

medj kulang (note: wag magrely dito magbasa pa ppt)

Mass

It is constant in any place and refers to the amount of substance. It can never be zero.

Mass

When travelled to the moon, the mass of an object will still be the same

Weight

It depends on the amount of gravity

Weight

Refers to the downward pull of the objects towards the center of the earth

Weight

When travelled to the moon, the weight of an object will only be 1/6 of its weight on earth

Pure Substance

are made up of only one kind of matter

Pure Substance

When travelled to the moon, the weight of an object will only be 1/6 of its weight on earth

Elements

building blocks of matter. it is a simplest form os substance that cannot be decomposed by chemical means.

Metals

elements characterized by their luster, ductility, malleability and are good conductors of heat and electricity.

Non-Metals

possess the characteristics opposite of metals.

Metalloids

elements which possesses the characteristics of both metals and non metals

Compounds

substances whose molecules are __made up of two or more kind of atoms in definite proportions__

Mixtures

composed of two or more substances. it can be homogenous or heterogenous.

Filtration

used the filtration set up. It works with particles that are significantly different in size, sand and rock with water.

Distillation

this methods of separating the mixtures can be used if they have different boiling points.

Centrifugation

processes rely on densities. Separates constituents by difference in their weights.

Sedimentation

happens when particles of different densities have settled within a liquid.

Physical Change

a change in the physical properties of substances __without changing its chemical position.__

Chemical Change

changes in matter wherein there is a change in the chemical composition and constitution of the substance.

Chemical change

in this change of matter the original identity of the substance is altered which forms new substance

Solids

It has definite size, shape, and volume.

Liquids

has definite volume, indefinite shape, follows the shape of the container

Gas

No definite shape, size and volume and expands when heated.

Plasma

Best electrical conductor and consists of ionized gases

Isotopes

atoms of the same element with the same atomic number, but different mass numbers.

Mass Number

total number of protons and neutrons on the nucleus of nucleons.

Atomic Number

number of protons in the nucleus, also the number of electrons

Atomic Number

This quantity is fundamental to the identity of each element because it is related to the electrical make-up of atom

James Chadwick

Who discovered neutrons?

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Neutrons

another component of a nucleus, it has no charge and has a mass of 1.675x10^-27 kg

Electron

the first component of atom to be identified, has a mass of 9.109x10-31 kg and charge of -1.602x10^-19C (coulombs).

Protons

a component of a nucleus that was discovered by Eugene Goldstein.

Dalton’s Atomic Theory

This theory states that elements are composed of extremely small partcles, called __atoms.__

Dalton’s Atomic Theory

All atoms of a given element are identical, having the same size, mass, and chemical properties. The atoms of one element are different from the atoms of all other elements.