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gas is produced in the chemical reaction between baking soda and vinegar
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gas is trapped in the container
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100 grams plus 5 grams equals to 105 grams
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baking soda is 5 grams
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if gases are released by a chemical reaction then the total mass of the product will be less than the total mass of the reactants
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baking soda can react chemically with vinegar
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vinegar is 100 grams
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water is made of hydrogen and oxygen
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water is a kind of liquid at room temperature
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hydrogen is a kind of gas at room temperature
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liquid state is a kind of nongaseous state
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water is a kind of compound
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oxygen is a kind of gas at room temperature
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substance y and substance z cannot be broken into simpler particles
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an element cannot be decomposed into two or more different substances by simple chemical methods
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a balloon is a kind of container
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helium is a kind of element
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elements are pure substances
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a balloon filled with helium
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iron is a kind of element
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rust is made of iron and oxygen
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oxygen is a kind of element
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table salt is sodum chloride
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sodium chloride is always made of chemically combined chlorine and sodium
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water is made of hydrogen and oxygen
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the chemical formula of water is h2o
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the number in chemical formula shows the number of atoms of each element in a molecule
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the elements in the chemical reaction stays the same after the reaction
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oxygen reacts with hydrogen to produce water
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oxygen reacts with iron to produce rust
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sugar is made of carbon, hydrogen, oxygen chemically combined
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carbon is a kind of element
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a compound is made of two or more elements chemically combined
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hydrogen is a kind of element
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oxygen is a kind of element
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organic compounds mainly are made of carbon / hydrogen / oxygen / nitrogen
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hydrogen is a kind of element
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first-aid instant cold pack is a kind of cold pack
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cold pack reaction is a kind of endothermic reaction
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an atom is a kind of object
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atoms of different elements have different structures
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organizing is sorting things in order by their properties
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structure is a property of an object
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elements from the same group in the periodic table are chemically reactive in a similar way
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alkaline earth metals are highly chemically reactive
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magnesium belongs to alkaline earth metal family , group 2 on the periodic table
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chemical reactions cause new substances to form
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combining two substances chemically causes chemical reactions
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magnesium is a kind of alkaline earth metal
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fluorine is a kind of gas
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magnesium and fluorine react chemically producing magnesium fluoride
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an element cannot be decomposed into two or more different substances by simple chemical methods
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sulfur cannot be decomposed into different substances by simple chemical methods
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iron oxide / rust / fe2o3 is made of iron and oxygen
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the chemical symbol for oxygen is o
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the chemical symbol for iron is fe
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the atom is the smallest particle that has the properties of an element
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gold is a kind of element
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iron is a kind of element
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the chemical symbol for iron is fe
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elements in the same group on the periodic table of elements have similar properties
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chemical reactivity is a property of elements and includes ordered values of reactive / unreactive
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if something is made of something else , then that something else will be the component of that something
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a component of something means a part of something
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organic compounds mainly are made of carbon / hydrogen / oxygen / nitrogen
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oxygen gas is made of only oxygen element
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if a substance is made of one element , then the substance is called an element
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o2 is a chemical formula for oxygen gas
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state of matter is a property of matter and includes ordered values of solid / liquid / gas
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hydrogen is a kind of gas at room temperature
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state of matter is a kind of physical property
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the periodic table of elements can be used for predicting the properties of an element
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a periodic table is a kind of scientific model
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an element is identified by its number of protons
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gold is a kind of element
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proton is a kind of subatomic particle
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elements in the same group on the periodic table of elements have similar properties
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calcium / beryllium belongs to alkaline earth metal family , group 2 on the periodic table
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the chemical symbol for tellurium is te
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antimony is a kind of metalloid
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the chemical symbol for antimony is sb
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tellurium is a kind of metalloid
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elements from the same group in the periodic table are chemically reactive in a similar way
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elements are all from the first group of the periodic table
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oxygen is a kind of element
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if the elements have similar chemical reactivity , then the elements will react with other elements in a similar way
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if the elements have similar electron configurations , then the elements will be grouped into same family / group on the periodic table of elements
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strontium, barium, and radium have similar electrom configurations
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if the outermost electron shell of an atom is complete, then the element of those atoms will not react with other elements easily
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elements in group 18 have complete outer electron shells on the periodic table of elements
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helium / neon / argon / krypton / xenon / radon belongs to noble gases family , group 18 on the periodic table
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elements in the same group on the periodic table of elements have similar properties
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a physical property is a kind of property
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nitrogen and phosphorus belongs to nitrogen family , group 15 on the periodic table
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elements in the same group on the periodic table of elements have similar properties
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the chemical symbol for nitrogen is n
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the chemical symbol for phosphorus is p
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if the elements have similar electron configurations , then the elements will be grouped into same family / group on the periodic table of elements
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the outer electron shell is a part of the electron configuration
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elements in group 18 have full / complete outer electron shells on the periodic table of elements
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