Answer:
yes
Explanation:islands and mountains
Answer:
mendeleev left a space
Explanation:
so the periodic table can be organize
During summer, the Earth's orbit brings Australia closer to the sun (as compared to Europe during its summer), resulting in an additional 7% solar UV intensity. Coupled with our clearer atmospheric conditions, this means that Australians are exposed to up to 15% more UV than Europeans.
The wave-mechanical model of the atom is required to explain the spectra of elements with multi electron atoms.
<u>Explanation:</u>
Wave mechanical theory say that every electron surrounding a nucleus occupies a certain orbit and moves in a certain direction, but the orbit is like a wave of energy or cloud but not a ring. It was proposed in the 1920s, when scientists Erwin Schrodinger and Louis Victor de Broglie concluded that the Bohr’s model is not suitable for electron location determination.
Based on many assumptions, scientists began to guess as accurately as possible about the behaviour of electrons at different energy levels around the nucleus. Because all electrons are negatively charged, they tend to push their elbows when they are too close together, moving away and changing direction. Each plane has one or more orbits that have more than one electrons that move around the nucleus in a specific patterns or shape.
Answer:
Models are important in the study of science because they explain a scientific phenomenon that is not directly experienced.
Explanation:
A Model in science is an idea, a process or a system applied by scientists to test hypothesis of a certain phenomenon in study. A model can be used to predict information using the data obtained. However, it is important to mention that after testing a model , a scientist can<u> improve it using new data</u> obtained in the area of study. Models are therefore <u>a vital part of scientific research and the results </u>communicated when explaining a phenomenon.
