Elements and Compounds Quiz (Form 1, Chemistry)

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Elements and Compounds Quiz (Form 1, Chemistry)


Froggy Jumps Elements and Compounds Quiz (Form 1, Chemistry)Versión en línea Elements vs Compounds: quick checks por YAKILI LMS 1 What is the definition of an element? a A mixture of different atoms b A substance made of only one type of atom c A substance formed by two or more compounds 2 Which term best describes material made of two or more elements chemically joined? a Mixture b Element c Compound 3 What is a property of many elements? a Cannot burn b Conducts electricity c Always liquid 4 Which is an example of an element? a Water b Salt c Hydrogen 5 What is a property of compounds? a Definite ratio of elements b Always magnetic c Always a gas 6 Which statement describes a compound? a Two or more elements chemically bonded b A single type of atom c A mixture of elements 7 Which is an example of a compound? a Oxygen b Water c Gold 8 What happens when elements form a compound? a Becomes a mixture b New substance with new properties c Same properties as elements 9 Which is a property of elements? a Always liquid b Always colorless c Defined by atomic number 10 What is the role of electrons in elements? a They are not present in atoms b They are inside the nucleus only c They occupy shells around the nucleus 11 What is an atom? a The smallest unit of an element b A molecule made of two elements c A type of compound 12 Which statement defines a pure element? a Contains only one type of atom b Always a gas c Contains many molecules 13 Which is a common property of many metals? a Brittleness b Malleability c Non-conductivity 14 Which is a non-metal example? a Iron b Hydrogen c Copper 15 What is the chemical formula for water? a H2O2 b H2O c HO2 16 What is a simple definition of a chemical formula? a The color of a substance b Shows which elements and how many c The shape of a molecule 17 Which is true about compounds in reactions? a They form new substances b They stay the same c They become elements 18 Which property can be used to identify a compound? a Variable composition b Always metallic luster c Fixed composition by mass 19 What describes elements in the periodic table? a Arranged by atomic number b Arranged randomly c Arranged by color 20 Which is an example of a molecule? a He b NaCl c O2 21 What does 'definite composition' mean in compounds? a Fixed ratio of elements b Only metals involved c Any ratio of elements 22 Which statement about elements is correct? a They are always liquids b They are made of two or more elements c They cannot be broken into simpler substances by chemical means 23 What is an example of a diatomic element? a Oxygen (O2) b Argon (Ar) c Sodium (Na) 24 Which is NOT a property of most metals? a Brittleness b Malleability c Good conductors 25 Which is a sign of a chemical change forming a compound? a Color change and new substance forms b Temporary mixing c Size increase only 26 Which is an element symbol? a H2O b N2O c Na 27 What is the simplest unit of a compound? a Molecule b Atom c Ion 28 Which is true about elements and compounds? a Compounds are elements only b Compounds break into mixtures c Elements combine to form compounds 29 Which is an example of a compound already given by formula? a O2 b Fe c CO2 30 What happens to energy during bond formation in compounds? a Energy is often released b No energy changes c Energy is always absorbed 31 Which property helps separate elements in a mixture but not in a compound? a No separation possible b Physical methods c Chemical methods 32 Which is an example of an element with symbol Fe? a Iron b Gold c Oxygen gas 33 Which statement is true for water (H2O)? a It is an element b It is a mixture c It is a compound 34 What describes a pure element’s atoms? a Atoms bonded loosely b All identical atoms c Different isotopes only 35 Which is a metal property? a Poor conductivity b Strong sour taste c Shiny luster 36 What is the product of combining H and O in water? a Water molecule b Hydrogen peroxide c Ozone 37 Which is a characteristic of many non-metals? a Poor electrical conductor b Malleable c High density 38 What is a chemical formula used to show? a Mass of a compound b Types and numbers of atoms c State of matter 39 Which represents an element in the periodic table? a Molecular formula like CO2 b Compound name like H2O c Symbol like Na, Fe 40 Which is a use of elements and compounds in everyday life? a Only in laboratories b Medicines and plastics c No practical uses 41 What does a mechanical mixture show? a Visible different parts b A chemical bond c One substance only 42 Which statement is true about elements and compounds? a Elements cannot react b Elements combine chemically to form compounds c Compounds become elements easily 43 Which is an example of a diatomic molecule? a Oxygen O2 b NaCl c CO2 44 What is the chemical formula for carbon dioxide? a CO b C2O c CO2 45 Which property helps identify a metal? a Low density only b Insolubility c Conductivity 46 What happens when a reaction forms a new substance? a A physical change only b No change in properties c A chemical change occurs 47 Which term describes a substance with two or more elements chemically bonded? a Element b Mixture c Compound 48 Which is a property of elements on the periodic table? a State at room temp defines it b Atomic number identifies the element c Color determines the element 49 What is the smallest unit that can be an element? a Molecule b Atom c Ion 50 Which describes a compound’s ratio? a Fixed composition by atoms b No atoms involved c Any varying ratio

Elements and Compounds Quiz (Form 1, Chemistry)

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Elements and Compounds Quiz (Form 1, Chemistry)Versión en línea

por YAKILI LMS

What is the definition of an element?

Which term best describes material made of two or more elements chemically joined?

What is a property of many elements?

Which is an example of an element?

What is a property of compounds?

Which statement describes a compound?

Which is an example of a compound?

What happens when elements form a compound?

Which is a property of elements?

What is the role of electrons in elements?

What is an atom?

Which statement defines a pure element?

Which is a common property of many metals?

Which is a non-metal example?

What is the chemical formula for water?

What is a simple definition of a chemical formula?

Which is true about compounds in reactions?

Which property can be used to identify a compound?

What describes elements in the periodic table?

Which is an example of a molecule?

What does 'definite composition' mean in compounds?

Which statement about elements is correct?

What is an example of a diatomic element?

Which is NOT a property of most metals?

Which is a sign of a chemical change forming a compound?

Which is an element symbol?

What is the simplest unit of a compound?

Which is true about elements and compounds?

Which is an example of a compound already given by formula?

What happens to energy during bond formation in compounds?

Which property helps separate elements in a mixture but not in a compound?

Which is an example of an element with symbol Fe?

Which statement is true for water (H2O)?

What describes a pure element’s atoms?

Which is a metal property?

What is the product of combining H and O in water?

Which is a characteristic of many non-metals?

What is a chemical formula used to show?

Which represents an element in the periodic table?

Which is a use of elements and compounds in everyday life?

What does a mechanical mixture show?

Which statement is true about elements and compounds?

Which is an example of a diatomic molecule?

What is the chemical formula for carbon dioxide?

Which property helps identify a metal?

What happens when a reaction forms a new substance?

Which term describes a substance with two or more elements chemically bonded?

Which is a property of elements on the periodic table?

What is the smallest unit that can be an element?

Which describes a compound’s ratio?