Questions | Answer | Link | Explanations |
| 1 A neutron has a charge of (1) +1 (2) +2 (3) 0 (4) -1 | 3 | Link | neutrons have no charge |
| 2 Which particle has the least mass? (1) alpha (3) neutron (2) beta particle (4) proton | 2 | Link | masses alpha=4 beta~0 neutron=1 proton =1 (Table O top numbers) |
| 3 A sample of matter must be copper if (1) each atom in the sample has 29 protons (2) atoms in the sample react with oxygen (3) the sample melts at 1768 K (4) the sample can conduct electricity | 1 | Link | same element same number of protons Cu has 29 protons |
| 4 In the electron cloud model of the atom, an orbital is defined as the most probable (1) charge of an electron (2) conductivity of an electron (3) location of an electron (4) mass of an electron | 3 | Link | electron cloud is the most probable location of an electron |
| 5 The elements of the Periodic Table are arranged on order of increasing (1) atomic number (2) mass number (3) number of isotopes (4) number of moles | 1 | Link | the periodic table is arranged by atomic number (maybe you should look at a periodic table and not take my word for it) |
| 6 Which element has the highest melting point? (1) tantalum (3) osmium (2) rhenium (4) hafnium | 2 | | Look at Table S under melting points (how clever) |
| 7 In chemical reactions, there is a conservation of (1) energy, volume and mass (2) energy, volume and charge (3) energy, charge and mass (4) energy, charge and volume | 3 | Link | Mass, charge and energy are must always be conserved (chemist are natures accountants) volume depends on temperature, pressure and number of moles |
| 8 At STP, both diamond and graphite are solids composed of carbon atoms. These solids have (1) the same crystal structure and same properties (2) the same crystal structure and different properties (3) different crystal structure and same properties (4) different crystal structure and different properties | 4 | Link | Since diamond and graphite are allotropes of carbon they are different so there properties and structures must be different |
| 9 The gram formula mass of a compound is 48 grams. The mass of 1.0 moles of this compound is (1) 1.0g (2) 4.8g (3) 48.0g (4) 480g | 3 | Link | gram formula mass is the molar mass this mass is the mass of 1.0 moles of this substance ALSO See #35 on this test |
| 10 Given the balanced equation representing a reaction: Cl2==> Cl + Cl (1) A bond is broken and energy is absorbed (2) A bond is broken and energy is released (3) A bond is formed and energy is absorbed (4) A bond is formed and energy is released | 1 | Link | Breaking bonds require energy so it is absorbed |