Most solids a) are dense and difficult to compress.
Most solids are closely compacted, their molecules are close together and vibrate. They don't move freely like gas or water molecules do.
They are difficult to be squeezed or flattened.
The answer is; B
Initially, the earth’s atmosphere was mainly filled with carbon dioxide and methane. However, with the evolution of photosynthetic organisms, the composition of the atmosphere changed to be mainly oxygen. This geological time is referred to as the great oxygenation event. The high oxygen levels resulted in oxidation of most the upper lithosphere.
The answer is; B
During this time, the organism on earth began to evolve and live on land. Therefore these geologic events are marked by fossilized of dead primitive organisms such as archaebacteria within the early rocks
Sodium belongs to Group 1A. It means that sodium has 1 valence electron. It needs to complete its octet electron or have the same configuration of a noble gas to become a stable ion. It would likely to release 1 electron to complete its octet than accept 7 more. Therefore, its ion form would be Na+.
<h3>What's Electronic configuration?</h3>
- The arrangement of an snippet's or patch's( or other physical structure's) electrons in their infinitesimal or molecular orbitals is known as the electron configuration in infinitesimal drugs and amount chemistry.
- For case, the neon grain's electron configuration is 1s2 2s2 2p6, which means that 1, 2 and 6 electrons, singly, are present in each of the 1s, 2s, and 2psubshells.
- According to electronic configurations, each electron moves collectively within an orbital while being girdled by an average field produced by all other orbitals.
- Slater determinants or configuration state functions are used to mathematically describe configurations.
<h3>What part does electronic configuration play?</h3>
- The chemical responses that an snippet can engage in as well as the types of motes that tittles can combine into to produce more complex composites depend on the electrical configuration of the snippet.
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Electrophoresis is a genetic engineering technique that can be used to separate segments of <em>DNA.</em>
The force acting between two charged particles A and B is 5.2 x 105 newtons. Charges A and B are 2.4 x 102 meters apart. If the charge on particle A is 7.2 x 108 coulombs, what is the charge of particle B? (k 7 9.0 x 109 newton meters?/coulomb)
