The scientific models are used because they allow scientists to make predictions and make it easier for scientists to avoid using data. option A and C is correct.
<h3>What are scientific models?</h3>
The scientific models are those which is given by scientists to allow them to make prediction about anything particular on which they are working or making research for it some examples are plum pudding model for an atom and bohr's model of an atom etc.
The biggest advantage is that scientists do not have to check the given data which are written into books they can perform their experiment and can conclude the data by performing experiment.
Therefore, scientific models are used because they allow scientists to make predictions and make it easier for scientists to avoid using data. option A and C is correct.
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I think the answer is A. (please dont kill me if im wrong xD)
D) Sulphur i think thats correct
Explanation:
a) Barium
b) The metalloid in third period is Silicon
c) Group 4A (or IVA) of the periodic table includes the nonmetal carbon (C)
d) At this temperature, fluorine and chlorine are gases, bromine is a liquid, and iodine and astatine are solids.
e) osmium
f) chlorine (Cl, element 17) are a gas at room temperature, and is found as diatomic molecule (Cl2).
True. Modern theory of Atom is still using the proposed ideas of Dalton, Thomson and Rutherford.
Explanation:
- Dalton created his atom theory - He said that all matter is made up of atoms and atoms can’t be created nor destroyed or divided into tiny particles. In the same element, all atoms will be identical in size and mass but atoms in the one element will be different in size and mass from the atoms in the other elements. Atoms of different elements combined and forming compounds.
- Thomson found that inferred atoms and negative electrons also contains the negative particles. He also concluded that there was a mass of positively charged material. He explained this with the Raisins Bun model.
- Using Gold Foil Experiment Rutherford found the positively charged nucleus in the centre of every atom. When he was doing this experiment, the positive particles which he passed through the foil got reflected at the centre. This led Rutherford to conclude about the positively charged nucleus at the centre. And he also found about revolving electrons around the nucleus because, in his experiment, some of the positive particles got attracted near the centre.
