Primeira Aula de Química

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.