WordPress database error: [Table './smDJtGH6wTJK5t/wp1f_actionscheduler_actions' is marked as crashed and last (automatic?) repair failed] SELECT a.hook FROM wp1f_actionscheduler_actions a
JOIN wp1f_actionscheduler_groups g ON g.group_id = a.group_id
WHERE g.slug = 'wp_mail_smtp' AND a.status IN ('in-progress', 'pending')
WordPress database error: [Table './smDJtGH6wTJK5t/wp1f_actionscheduler_actions' is marked as crashed and last (automatic?) repair failed] SELECT a.action_id FROM wp1f_actionscheduler_actions a WHERE 1=1 AND a.hook='wp_mail_smtp_summary_report_email' AND a.status IN ('in-progress', 'pending') LIMIT 0, 1
WordPress database error: [Table './smDJtGH6wTJK5t/wp1f_actionscheduler_actions' is marked as crashed and last (automatic?) repair failed]
INSERT INTO wp1f_actionscheduler_actions ( `hook`, `status`, `scheduled_date_gmt`, `scheduled_date_local`, `schedule`, `group_id`, `priority`, `args` )
SELECT 'wp_mail_smtp_summary_report_email', 'pending', '2026-06-01 11:00:00', '2026-06-01 14:00:00', 'O:32:\"ActionScheduler_IntervalSchedule\":5:{s:22:\"\0*\0scheduled_timestamp\";i:1780311600;s:18:\"\0*\0first_timestamp\";i:1780311600;s:13:\"\0*\0recurrence\";i:604800;s:49:\"\0ActionScheduler_IntervalSchedule\0start_timestamp\";i:1780311600;s:53:\"\0ActionScheduler_IntervalSchedule\0interval_in_seconds\";i:604800;}', 13, 10, '[null]' FROM DUAL
WHERE (
SELECT action_id FROM wp1f_actionscheduler_actions
WHERE status IN ( 'pending', 'in-progress' )
AND hook = 'wp_mail_smtp_summary_report_email'
AND `group_id` = 13
LIMIT 1 ) IS NULL
WordPress database error: [Table './smDJtGH6wTJK5t/wp1f_actionscheduler_actions' is marked as crashed and last (automatic?) repair failed] SELECT a.action_id FROM wp1f_actionscheduler_actions a WHERE 1=1 AND a.hook='wp_mail_smtp_admin_notifications_update' AND a.status IN ('in-progress', 'pending') LIMIT 0, 1
WordPress database error: [Table './smDJtGH6wTJK5t/wp1f_actionscheduler_actions' is marked as crashed and last (automatic?) repair failed]
INSERT INTO wp1f_actionscheduler_actions ( `hook`, `status`, `scheduled_date_gmt`, `scheduled_date_local`, `schedule`, `group_id`, `priority`, `args` )
SELECT 'wp_mail_smtp_admin_notifications_update', 'pending', '2026-05-30 21:53:17', '2026-05-31 00:53:17', 'O:32:\"ActionScheduler_IntervalSchedule\":5:{s:22:\"\0*\0scheduled_timestamp\";i:1780177997;s:18:\"\0*\0first_timestamp\";i:1780177997;s:13:\"\0*\0recurrence\";i:86400;s:49:\"\0ActionScheduler_IntervalSchedule\0start_timestamp\";i:1780177997;s:53:\"\0ActionScheduler_IntervalSchedule\0interval_in_seconds\";i:86400;}', 13, 10, '[null]' FROM DUAL
WHERE (
SELECT action_id FROM wp1f_actionscheduler_actions
WHERE status IN ( 'pending', 'in-progress' )
AND hook = 'wp_mail_smtp_admin_notifications_update'
AND `group_id` = 13
LIMIT 1 ) IS NULL
WordPress database error: [Table './smDJtGH6wTJK5t/wp1f_actionscheduler_actions' is marked as crashed and last (automatic?) repair failed] SELECT a.action_id FROM wp1f_actionscheduler_actions a LEFT JOIN wp1f_actionscheduler_groups g ON g.group_id=a.group_id WHERE 1=1 AND g.slug='aioseo' AND a.hook='aioseo_cache_prune' AND a.args='[]' AND a.status IN ('in-progress', 'pending') LIMIT 0, 1
WordPress database error: [Table './smDJtGH6wTJK5t/wp1f_actionscheduler_actions' is marked as crashed and last (automatic?) repair failed] SELECT a.action_id FROM wp1f_actionscheduler_actions a LEFT JOIN wp1f_actionscheduler_groups g ON g.group_id=a.group_id WHERE 1=1 AND g.slug='aioseo' AND a.hook='aioseo_cache_prune' AND a.args='[]' AND a.status IN ('in-progress', 'pending') LIMIT 0, 1
WordPress database error: [Table './smDJtGH6wTJK5t/wp1f_actionscheduler_actions' is marked as crashed and last (automatic?) repair failed]
INSERT INTO wp1f_actionscheduler_actions ( `hook`, `status`, `scheduled_date_gmt`, `scheduled_date_local`, `schedule`, `group_id`, `priority`, `args` )
SELECT 'aioseo_cache_prune', 'pending', '2026-05-30 21:52:17', '2026-05-31 00:52:17', 'O:32:\"ActionScheduler_IntervalSchedule\":5:{s:22:\"\0*\0scheduled_timestamp\";i:1780177937;s:18:\"\0*\0first_timestamp\";i:1780177937;s:13:\"\0*\0recurrence\";i:86400;s:49:\"\0ActionScheduler_IntervalSchedule\0start_timestamp\";i:1780177937;s:53:\"\0ActionScheduler_IntervalSchedule\0interval_in_seconds\";i:86400;}', 9, 10, '[]' FROM DUAL
WHERE ( SELECT NULL FROM DUAL ) IS NULL
WordPress database error: [Table './smDJtGH6wTJK5t/wp1f_actionscheduler_actions' is marked as crashed and last (automatic?) repair failed] SELECT a.action_id FROM wp1f_actionscheduler_actions a LEFT JOIN wp1f_actionscheduler_groups g ON g.group_id=a.group_id WHERE 1=1 AND g.slug='aioseo' AND a.hook='aioseo_cache_prune' AND a.args='[]' AND a.status IN ('in-progress', 'pending') LIMIT 0, 1
WordPress database error: [Table './smDJtGH6wTJK5t/wp1f_actionscheduler_actions' is marked as crashed and last (automatic?) repair failed] SELECT a.action_id FROM wp1f_actionscheduler_actions a LEFT JOIN wp1f_actionscheduler_groups g ON g.group_id=a.group_id WHERE 1=1 AND g.slug='aioseo' AND a.hook='aioseo_cache_prune' AND a.args='[]' AND a.status IN ('in-progress', 'pending') LIMIT 0, 1
WordPress database error: [Table './smDJtGH6wTJK5t/wp1f_actionscheduler_actions' is marked as crashed and last (automatic?) repair failed]
INSERT INTO wp1f_actionscheduler_actions ( `hook`, `status`, `scheduled_date_gmt`, `scheduled_date_local`, `schedule`, `group_id`, `priority`, `args` )
SELECT 'aioseo_cache_prune', 'pending', '2026-05-30 21:52:17', '2026-05-31 00:52:17', 'O:32:\"ActionScheduler_IntervalSchedule\":5:{s:22:\"\0*\0scheduled_timestamp\";i:1780177937;s:18:\"\0*\0first_timestamp\";i:1780177937;s:13:\"\0*\0recurrence\";i:86400;s:49:\"\0ActionScheduler_IntervalSchedule\0start_timestamp\";i:1780177937;s:53:\"\0ActionScheduler_IntervalSchedule\0interval_in_seconds\";i:86400;}', 9, 10, '[]' FROM DUAL
WHERE ( SELECT NULL FROM DUAL ) IS NULL
WordPress database error: [Table './smDJtGH6wTJK5t/wp1f_actionscheduler_actions' is marked as crashed and last (automatic?) repair failed] SELECT a.action_id FROM wp1f_actionscheduler_actions a WHERE 1=1 AND a.hook='woocommerce_ac_send_email_action' AND a.status IN ('in-progress') ORDER BY a.scheduled_date_gmt ASC LIMIT 0, 1
WordPress database error: [Table './smDJtGH6wTJK5t/wp1f_actionscheduler_actions' is marked as crashed and last (automatic?) repair failed] SELECT a.action_id FROM wp1f_actionscheduler_actions a WHERE 1=1 AND a.hook='woocommerce_ac_send_email_action' AND a.status IN ('pending') ORDER BY a.scheduled_date_gmt ASC LIMIT 0, 1
WordPress database error: [Table './smDJtGH6wTJK5t/wp1f_actionscheduler_actions' is marked as crashed and last (automatic?) repair failed]
INSERT INTO wp1f_actionscheduler_actions ( `hook`, `status`, `scheduled_date_gmt`, `scheduled_date_local`, `schedule`, `group_id`, `priority`, `args` )
SELECT 'woocommerce_ac_send_email_action', 'pending', '2026-05-30 21:53:17', '2026-05-31 00:53:17', 'O:32:\"ActionScheduler_IntervalSchedule\":5:{s:22:\"\0*\0scheduled_timestamp\";i:1780177997;s:18:\"\0*\0first_timestamp\";i:1780177997;s:13:\"\0*\0recurrence\";i:900;s:49:\"\0ActionScheduler_IntervalSchedule\0start_timestamp\";i:1780177997;s:53:\"\0ActionScheduler_IntervalSchedule\0interval_in_seconds\";i:900;}', 10, 10, '[]' FROM DUAL
WHERE ( SELECT NULL FROM DUAL ) IS NULL
Notice: woocommerce_recently_viewed cookie cannot be set - headers already sent by /home/staging.pickabook.co.ke/public_html/wp-includes/class-wpdb.php on line 1851 in /home/staging.pickabook.co.ke/public_html/wp-content/plugins/woocommerce/includes/wc-core-functions.php on line 975 Cambridge IGCSE Chemistry Practical Skills - Pick A Book Limited
Improve scientific enquiry and practical skills with suggested key experiments and simple, structured guidance.
The Practical Skills Workbook provides additional support for the accompanying Cambridge IGCSE (TM) Chemistry Textbook.
Become accomplished scientists: the workbook provides a series of investigations with step-by-step guidance which leads you through the method and the use of apparatus, complete with safety notes.
Improve the quality of written work: guidance, prompts and write in frames provided throughout to help you record your observations, interpret data and evaluate the experiment.
Develop understanding and build confidence: plenty of exam-style questions are provided for preparation for practical exams or alternatives, whilst ‘Going Further’ questions encourage you to stretch yourself.
WordPress database error: [Table './smDJtGH6wTJK5t/wp1f_actionscheduler_actions' is marked as crashed and last (automatic?) repair failed] SELECT a.action_id FROM wp1f_actionscheduler_actions a WHERE 1=1 AND a.hook='wc_schedule_pending_batch_processes' AND a.status IN ('in-progress', 'pending') LIMIT 0, 1
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