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Discover the Sleeping Habits and Unique Characteristics of the Ornitorincul

5 Questions

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Discover the Sleeping Habits and Unique Characteristics of the Ornitorincul

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Questions and Answers

Care sunt cele două tipuri de transformări studiate în chimie?

Transformări fizice și chimice (correct)

Transformări fizice și biologice

Transformări chimice și biologice

Transformări fizice și nucleare

Cine a emis ipoteza că substanțele sunt formate din atomi?

Curie

Newton

Einstein

Dalton (correct)

Care este prima ipoteză referitoare la atom?

Atomul este format din nucleu și înveliș electronic

Atomul este format din particule subatomice

Atomul este cea mai mică parte a materiei care nu poate fi fragmentată prin procedee fizico-chimice obișnuite (correct)

Atomul este format din protoni, neutroni și electroni

Care este sarcina și masa protonilor?

<p>Sarcina pozitivă și masa aproximativ egală cu 1</p> Signup and view all the answers

Ce ajută descoperirile din fizică în studiul structurii atomului?

<p>Radioactivitatea și emisiile de electroni prin metale incandescente</p> Signup and view all the answers

Study Notes

Key Concepts in Chemistry

Chemistry is the science that studies matter and its transformations.
Physical transformations involve changes in the physical properties of substances without the formation of new substances.
Chemical transformations involve the formation of new substances.
In 1805, Dalton proposed the hypothesis that substances are made up of atoms.
The first hypothesis stated that the atom is the smallest part of matter that cannot be further divided by ordinary physical and chemical means.
Discoveries in physics, such as radioactivity and electron emissions, have aided in the study of atomic structure.
An atom is composed of a nucleus and an electron cloud.
The nucleus contains protons, which have a positive charge and a mass of approximately 1.
The nucleus also contains neutrons, which have no charge and a mass of approximately 1.
The electron cloud surrounds the nucleus and contains electrons, which have a negative charge and a negligible mass.

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Description

Test your knowledge about the ornitorincul's sleeping habits and unique characteristics in this quiz. Discover how this fascinating creature sleeps and find out how many times a day it rests with its head down. Explore interesting facts about the ornitorincul and learn why it is known for its distinct features.