If atoms are made up of smaller parts such as electrons why are atoms considered as the basic unit of matter

Calcium sulfide forms when calcium loses 2 valence electrons to sulfur. What type of a bond is formed? Select one of the options below as your answer: A) covalent B) ionic

How many moles of copper are present in a sample of tennantite with a mass of 2370 grams

What change in atomic number occurs when a nucleus emits an alpha particle? a beta particle? a gamma ray?

At 4 degrees Celsius, pure water has a density of 1 g/mL (1 g/cm cubed). Suppose that you have 2 liters (2000 cm cubed) of pure water at this temperature. What is the mass of this water?

At the end of 2019, Blossom Company has accounts receivable of $756,900 and an allowance for doubtful accounts of $59,600.

Which statement best describes a mole?

The data below were collected for the following reaction at 500 ∘C: CH3CN (g) →CH3NC (g) Time (h) [CH3CN] (M) 0.0 1.000 5.0 0.794 10.0 0.631 15.0 0.501 20.0 0.398 25.0 0.

How do i convert 3.00 moles H2 to molecules?

How can you use the chemical formulas for sucrose (C6H, 20,) and rust (Fe, O,) to classity them ionic or molecular compounds?

What is true of energy as is passes through an ecosystem? a. All of the energy in an organism is used by the animal that eats it. b. Any stored energy in an organism is used by the animal that eats it. c.