8Fa Dalton's Atomic model gamma

Last updated 8 months ago

10 questions

1

Which statement about Dalton's atomic model is correct?

Atoms can be divided into smaller parts

Atoms of the same element can have different masses

Atoms of different elements combine in simple whole-number ratios

Atoms have a nucleus made of protons and neutrons

Atoms can be created or destroyed

Atoms are rearranged in chemical reactions but not changed

Atoms disappear after chemical reactions

Atoms change into new atoms during reactions

Oxygen and Magnesium 

Fluorine and Neon 

Carbon and Potassium 

Helium and Lithium 

High density

Conduct heat and electricity well

Form acidic oxides

Malleable and ductile

Elements with higher atomic mass are always gases

Elements with lower atomic mass are always liquids

Elements with similar atomic masses are in the same physical state

There is no direct relationship between atomic mass and physical state

Argon – gas at room temperature

Silver – shiny, good conductor of electricity

Gold – heavy, soft metal

Aluminium – light, strong metal

Atoms of different elements cannot combine

Compounds are made when atoms lose electrons

Compounds are made of atoms of different elements combined in fixed ratios

Compounds form when atoms merge into one

Sodium (Na) – 11

Carbon (C) – 6

Potassium (K) – 19

All of the above

A) Lead (Pb)

B) Sulfur (S)

C) Phosphorus (P)

D) Calcium (C)

Which statement about Dalton's atomic model is correct?

Atoms can be divided into smaller parts

Atoms of the same element can have different masses

Atoms of different elements combine in simple whole-number ratios

Atoms have a nucleus made of protons and neutrons

Dalton’s atomic theory helped explain the law of conservation of mass by stating that:

Atoms can be created or destroyed

Atoms are rearranged in chemical reactions but not changed

Atoms disappear after chemical reactions

Atoms change into new atoms during reactions

Which pair of elements both have symbols with only one letter?

Oxygen and Magnesium 

Fluorine and Neon 

Carbon and Potassium 

Helium and Lithium 

Which property is most typical of metal elements?

High density

Conduct heat and electricity well

Form acidic oxides

Malleable and ductile

Which statement about elements and atomic mass is true?

Elements with higher atomic mass are always gases

Elements with lower atomic mass are always liquids

Elements with similar atomic masses are in the same physical state

There is no direct relationship between atomic mass and physical state

Which element has the symbol 'Ag' and what is its physical property?

Argon – gas at room temperature

Silver – shiny, good conductor of electricity

Gold – heavy, soft metal

Aluminium – light, strong metal

How did Dalton's atomic theory support the idea that compounds are formed?

Atoms of different elements cannot combine

Compounds are made when atoms lose electrons

Compounds are made of atoms of different elements combined in fixed ratios

Compounds form when atoms merge into one

Which of the following is a correct symbol for an element and its atomic number?

Sodium (Na) – 11

Carbon (C) – 6

Potassium (K) – 19

All of the above

Which of these is an incorrect pairing of an element and its symbol?

A) Lead (Pb)

B) Sulfur (S)

C) Phosphorus (P)

D) Calcium (C)