Gr 10 Physical Sciences Ch 2: Atomic mass and diameter

<p>1 u</p> Signup and view all the answers

<p>The alpha particles were deflected by the gold foil, contradicting the 'plum pudding' model</p> Signup and view all the answers

<p>1.67 × 10⁻²⁴ grams</p> Signup and view all the answers

<p>Nitrogen</p> Signup and view all the answers

<p>40.1 u</p> Signup and view all the answers

<p>Some alpha particles were deflected at large angles, and a few even bounced back.</p> Signup and view all the answers

<p>It is positively charged and tiny.</p> Signup and view all the answers

<p>A pea in a soccer stadium.</p> Signup and view all the answers

<p>The average mass of all the isotopes of that element.</p> Signup and view all the answers

<p>To better understand the scale and structure of atoms, which underpin much of science and technology.</p> Signup and view all the answers

<p>They orbit the nucleus like planets orbit the sun.</p> Signup and view all the answers

<p>It is the majority of the atom's volume.</p> Signup and view all the answers

<p>To understand the average mass of all the isotopes of that element.</p> Signup and view all the answers

<p>It is a relative scale for comparing atomic masses.</p> Signup and view all the answers

<p>To test the 'plum pudding' model of the atom.</p> Signup and view all the answers

<p>14.0 u</p> Signup and view all the answers

<p>It is the mass of a hydrogen atom in kilograms.</p> Signup and view all the answers

<p>16.0 u</p> Signup and view all the answers

<p>The alpha particles were deflected at a large angle.</p> Signup and view all the answers

<p>24.0 u</p> Signup and view all the answers

<p>79.9 u</p> Signup and view all the answers

<p>The nucleus contains most of the atom's mass</p> Signup and view all the answers

<p>The center of the atom where most of the mass is located</p> Signup and view all the answers

<p>To understand the scale and structure of atoms</p> Signup and view all the answers

<p>Most alpha particles passed straight through the foil, and a few were deflected at large angles</p> Signup and view all the answers

<p>They are weighted according to their relative abundance</p> Signup and view all the answers

<p>Electrons orbiting a dense, positively charged nucleus</p> Signup and view all the answers

<p>They are crucial for understanding the properties of materials and chemical reactions</p> Signup and view all the answers

<p>The nucleus is smaller than the atom's overall size</p> Signup and view all the answers

<p>It provides a relative scale for comparing the masses of different atoms</p> Signup and view all the answers

<p>To investigate the structure of the atom</p> Signup and view all the answers

<p>39.1 u</p> Signup and view all the answers

<p>The mass of an atom is directly proportional to its atomic mass unit</p> Signup and view all the answers

<p>It is the value of 1 atomic mass unit in kilograms</p> Signup and view all the answers

<p>Because they are extremely small and not directly observable</p> Signup and view all the answers

<p>79.9 u</p> Signup and view all the answers

<p>To simplify the comparison of atomic masses</p> Signup and view all the answers

<p>The density of the nucleus in the atom</p> Signup and view all the answers

<p>It provides a representation of the average mass of all isotopes</p> Signup and view all the answers

<p>The majority of the atom's mass is located in the nucleus</p> Signup and view all the answers

<p>To simplify the representation of atomic masses</p> Signup and view all the answers

<p>They have different atomic masses but the same chemical properties</p> Signup and view all the answers

<p>It provides insight into the structure and properties of matter</p> Signup and view all the answers

<p>They orbit the nucleus, much like planets orbit the sun</p> Signup and view all the answers

<p>The nucleus is relatively small compared to the atom's diameter</p> Signup and view all the answers

<p>The dense nucleus of the atom is positively charged and scatters the alpha particles</p> Signup and view all the answers

<p>It takes into account the relative abundance of different isotopes of an element</p> Signup and view all the answers

<p>It is a tiny, dense, positively charged region at the center of the atom</p> Signup and view all the answers

<p>It is crucial in understanding the properties of materials and chemical reactions</p> Signup and view all the answers

<p>A pea in a soccer stadium</p> Signup and view all the answers