Chemistry In Focus Chapter 1 Summary
Negatively charged ions are called _____ - correct answersAnions
The smallest particle of an element that is still recognisable as that element is called an _____ - correct
answersAtom
The process in which a liquid changes to a gas or vapour with the formation of bubbles throughout the
liquid is called _____ - correct answersBoiling
Positively charged ions are called _____ - correct answersCations
A change in which at least one new substance is formed is called a _____ _____or _____ _____ - correct
answersChemical change chemical reaction
A pure substance that can be decomposed into simpler substances are called _____ - correct
answersCompounds
When a gas or vapour changes into a liquid it's called _____ or _____ - correct answersCondensation
liquefaction
Oxygen is an element, however, oxygen gas is not present as seperate independent atoms, instead it
exists as pairs of atoms permanently stuck together to form molecules. Because of this, we say that
oxygen gas is a _____ molecule. - correct answersDiatomic
Pure substances that cannot be decomposed into simpler substances are called _____ - correct
answersElements
The change of a liquid to a gas or vapour without the formation of bubbles is called _____ or _____ -
correct answersEvaporation vaporisation
The _____ of a _____ that exists as _____ is a combination of symbols of the elements in the compound
with subscripts denoting how many atoms of each element are in the molecule. - correct
answersFormula compound molecules
Negatively charged ions are called _____ - correct answersAnions
The smallest particle of an element that is still recognisable as that element is called an _____ - correct
answersAtom
The process in which a liquid changes to a gas or vapour with the formation of bubbles throughout the
liquid is called _____ - correct answersBoiling
Positively charged ions are called _____ - correct answersCations
A change in which at least one new substance is formed is called a _____ _____or _____ _____ - correct
answersChemical change chemical reaction
A pure substance that can be decomposed into simpler substances are called _____ - correct
answersCompounds
When a gas or vapour changes into a liquid it's called _____ or _____ - correct answersCondensation
liquefaction
Oxygen is an element, however, oxygen gas is not present as seperate independent atoms, instead it
exists as pairs of atoms permanently stuck together to form molecules. Because of this, we say that
oxygen gas is a _____ molecule. - correct answersDiatomic
Pure substances that cannot be decomposed into simpler substances are called _____ - correct
answersElements
The change of a liquid to a gas or vapour without the formation of bubbles is called _____ or _____ -
correct answersEvaporation vaporisation
The _____ of a _____ that exists as _____ is a combination of symbols of the elements in the compound
with subscripts denoting how many atoms of each element are in the molecule. - correct
answersFormula compound molecules
