NEW
Font size
WorksheetsPrimeira Aula de Química
Total questions: 10
Worksheet time: 5mins
What is the basic structure of an atom?
Nucleus composed of protons and electrons, around which neutrons orbit
Nucleus composed of protons and neutrons, around which electrons orbit
Nucleus composed of electrons and neutrons, around which protons orbit
Nucleus composed of neutrons and electrons, around which protons orbit
What's the scoop on ionic and covalent bonds?
Ionic bonds happen when oppositely charged ions come together, while covalent bonds occur when atoms share electron pairs.
Ionic bonds occur when atoms share electron pairs, while covalent bonds occur between oppositely charged ions.
Ionic bonds occur when atoms share electron pairs, while covalent bonds occur between atoms of the same element.
Ionic bonds occur between atoms of the same element, while covalent bonds occur between atoms of different elements.
Descreva um exemplo de uma reação química.
A queima de papel
A fermentação do pão
A poda de uma planta
A pintura de uma parede
Quantos elementos estão presentes na tabela periódica?
118
63
92
75
What are the different states of matter and their characteristics?
Solid, liquid, and gas
Hot, cold, and warm
Clear, dark, and colorful
Sweet, salty, and bitter
What is the chemical equation for the combustion reaction of methane?
CH4 + 2O2 -> CO2 + 2H2O
CH4 + 2O2 -> CO + 2H2
CH4 + 3O2 -> CO2 + 2H2O
CH4 + O2 -> CO2 + H2O
Dê um exemplo de uma curiosidade interessante na química.
O oxigênio é um metal pesado
A água é composta por átomos de hidrogênio e hélio
O carbono é um gás nobre
O elemento mercúrio é o único metal que é líquido em temperatura ambiente.
Can you name at least three laboratory glassware and their uses?
Some cool laboratory glassware and their uses are: round bottom flask (used for small-scale chemical reactions), graduated cylinder (used for measuring liquid volumes), and pipette (used for precise liquid transfers).
Test tube (used for storing liquids)
PET bottle (used for chemical reactions)
Beaker (used for measuring temperatures)
What are the important safety measures to be followed in a chemistry laboratory?
Ignore safety regulations
Wear personal protective equipment, follow handling and disposal procedures for chemicals, and know emergency procedures.
Do not worry about emergency procedures
Wear casual clothes and flip-flops in the laboratory
Quais são as oportunidades de trabalho para um técnico em química no mercado atual?
Restaurantes
Lojas de roupas
Construção civil
Indústrias químicas, laboratórios, empresas de cosméticos, farmacêuticas, entre outros.
