25.1 quiz
暂无描述。系统推荐的高质量记忆内容，适合每天坚持背诵学习。
卡片预览 (19 张)
what factors do not affect nuclear reactions, but do affect chemical reactions?
change in: ○ temperature ○ pressure ○ catalysts
what are the 3 main types of nuclear radiation?
alpha, beta, and gamma
briefly describe alpha radiation
○ made of 2 protons and 2 neutrons (like a helium nucleus) ○ low penetration- stopped by paper or skin ○ dangerous if inhaled or ingested ○ 2+ charge
briefly describe beta radiation
○ results when neutron breaks down into a proton & election ○ fast moving electrons ○ 1- charge
briefly describe gamma radiation
○ high energy photons ○ only partially blocked by meters of concrete/lead ○ 0 charge
what part of an atom undergoes change during radioactive decay?
nucleus
how is the atomic # of a nucleus changed by alpha decay? by beta decay? by gamma decay?
𝐚𝐥𝐩𝐡𝐚 𝐝𝐞𝐜𝐚𝐲: ○ -2 (loses 2 protons) 𝐛𝐞𝐭𝐚 𝐝𝐞𝐜𝐚𝐲: ○ +1 𝐠𝐚𝐦𝐦𝐚 𝐝𝐞𝐜𝐚𝐲: ○ nothign!!
what 2 items must be equal for a nuclear equation to be balanced?
○ mass # (protons + neutrons) ○ atomic # (protons)
how does alpha decay affect the mass # of a nucleus? how does beta decay affect the mass #?
𝐚𝐥𝐩𝐡𝐚 𝐝𝐞𝐜𝐚𝐲: ○ -4 (-2 protons, -2 neutrons) 𝐛𝐞𝐭𝐚 𝐝𝐞𝐜𝐚𝐲: ○ stays same
which of the 3 types of radiation described in this lesson is the most penetrating, and why?
𝐠𝐚𝐦𝐦𝐚 cuz it’s pure energy with no charge ○ it can pass through literally anything, and thick concrete/lead BARELY blocks it
when polonium-210 decays by alpha radiation, what isotope is formed?
when polonium-210 decays by alpha radiation, it loses 2 protons and 2 neutrons mass #: 210 –> 210 - 4 = 206 atomic #: 84 –> 84 - 2 = 82 element with atomic # 82 = Lead-206 ⁸⁴𝐏𝐨²¹⁰ → ₂𝐇𝐞⁴ + ₈₂𝐏𝐛²⁰⁶
Db
Dubnium
Sg
Seaborgium
Bh
Bohrium
Hs
Hassium
Mt
Meitnerium
Ds
Darmstadtium
Rg
Roentgenium
Cn
Copernicium