What are the smallest units an element can be broken down into and still retain its defining properties?

molecules

protons, neutrons, and electrons

nanograms

atoms

2+2 because i really know im just trying something real quick

What is the most important part of science

Which is a characteristic of the electron sea model for metallic bonding? A) Molecular orbitals overlap to produce bands. B) Electrons flow easily between metal nuclei. C) Electrons are in fixed positions in the orbitals.

1.11g of methane CH4 is burned in a bomb calorimeter containing 1000 grams of water. The initial temperature of water is 24.85 degrees Celsius. The specific heat of water is 4.184 J/g degrees Celsius.

The transition of an electron from an excited energy state to the ground state always results in A. the absorption of energy B. the emission of electromagnetic radiation D. an increase in the energy of the electron C. the emission of visible light

What does the number next to the ion signify?

Write a molecular equation for the precipitation reaction potassium chloride and lead (II) acetate

Which outcome is not caused by gravitational force?

Explain the properties of the substance around us depend on the atoms and molecules that compose them

What is an ion (1 mark) what is the charge on a chloride ion (1 mark) what is an ionic bond (1 mark)