1. Dalton's idea that atoms cannot be divided into smaller parts was disproved by the discovery of the ____.
2. The description of the structure of the atom is called the ___.
3. In a water molecule, two atoms of hydrogen and one atom of oxygen share electrons. A _____ bond is found in a water molecule.
4. Sodium chloride is formed when the metal sodium bonds to the nonmetal chlorine. The atoms are held together by an ____.
5. One way the modern atomic model differs from Thomson's atomic model is that electrons are no longer scattered throughout an atom's positive matter like chocolate chips in cookie dough. Instead, each electron is outside of the nucleus occupying a specific _____.
6. If new information about the behavior of atoms is discovered and verified, then revision will need to be made to the current ____.
7. The number of protons in the nucleus of an atom is its ___.
Word bank:
Atomic number**7
ionic bond
atomic mass
law of conservation of mass**1
endothermic reaction
electron
ionic bond**4
covalent bond**3
product
isotope**5
proton
carbon cycle
energy level, orbital, or shell
atomic model**2
atomic theory**6
Please help (:
atrom cannot be divide in well prove it
But are his answers correct?
Photosynthesis is an example of an endothermic chemical reaction. In this process, plants use the energy from the sun to convert carbon dioxide and water into glucose and oxygen.
1. Dalton's idea that atoms cannot be divided into smaller parts was disproved by the discovery of the **electron**. This discovery showed that atoms can be further divided into subatomic particles.
2. The description of the structure of the atom is called the **atomic model**. The atomic model explains how the different subatomic particles (protons, neutrons, and electrons) are arranged within an atom.
3. In a water molecule, two atoms of hydrogen and one atom of oxygen share electrons. A **covalent bond** is found in a water molecule. Covalent bonds occur when atoms share electrons to achieve a more stable electron configuration.
4. Sodium chloride is formed when the metal sodium bonds to the nonmetal chlorine. The atoms are held together by an **ionic bond**. Ionic bonds occur when one atom transfers electrons to another atom, resulting in the formation of positively charged ions and negatively charged ions that attract each other.
5. One way the modern atomic model differs from Thomson's atomic model is that electrons are no longer scattered throughout an atom's positive matter like chocolate chips in cookie dough. Instead, each electron is outside of the nucleus occupying a specific **energy level, orbital, or shell**. This concept of electron energy levels explains the discreet orbits or regions where electrons are most likely to be found around the nucleus.
6. If new information about the behavior of atoms is discovered and verified, then revision will need to be made to the current **atomic theory**. Atomic theory is a collection of scientific principles and hypotheses that explain the behavior of atoms. It is subject to revision as new evidence and experimental findings emerge.
7. The number of protons in the nucleus of an atom is its **atomic number**. The atomic number determines the element's identity and its position in the periodic table.